Pogust

6-7 m seem to be minimum for durian. They grow very wide. I'm in durian area. You could consider planting some fast growing legumes between that give shade to durians the first years. Many here use bananas for that. Bananas are good mulch producers too and help the soil.

Mangosteen could have less spacing. I see 4-5 m in some old orchards. They grow so slow that if you plant for the size it will reach after 10-15 years you have too much empty space between for the first years. 

2 good places to look for info:

https://pfaf.org/user/Default.aspx

https://tropical.theferns.info/

I bought a load of cow manure once that trees didn't like. They didn't die but looked sad for a while. Is the brown grass area the same that you added manure to?

Depending what you will use it for, there are many hardwoods here that chippers can't handle easily. I have a 13 hp chipper that works reasonably well with soft wood like leuceana, moringa, sesbania. It's not fast, for smallish things like mulch to the weg garden it's OK. I very rarely use it, easier to just chop and drop around fruit trees.

You need a permaculture designer. If you contact me directly I might be able to help. I'm in Rayong area.

Fungus need food to grow. Dust/dirt in the air sticks to door and fungus has a place to live. Cleaning often will stop fungus growth. Hot moist climate and dirt in air is the main problem. Some paints (and maybe some plastic doors) have anti-fungus chemicals in them and reduce growth. A glossy paint will make it easier to keep doors clean.

I have built 3 houses using 20 cm Q-con or same blocks of other producer. One story buildings with lightweight roof constructions. No need for 25 cm walls in this climate. 7,5 or 10 cm for inside walls. Fast and easy building if the workers understand how to glue AAC blocks. There was G4 load bearing blocks available some years ago, don't know now. Anyway a light construction with 20 cm works in most cases with G2 if you have some concrete beams involved.

If you build two story house of course it's another construction with lots of concrete and rebar.

I used both steel roofs and the SCG fiber. Steel roof with the insulation glued to it helps with heat. I found that a 5 cm insulation mat above the ceiling is all I need, even with the fiber cement roof.

Looked at both alu and plastic windows but went with quality hardwood in the end.

If you are in the south you are probably not far from the sea and don't get so high temps as up in Issan. Thus no need for extreme insulation.

If you send pm I can supply pictures and explanation of my constructions.

Items small enough is best sent with China Post. It can take some time but much cheaper than Fedex or similar service. If small enough parcel it can slip through without any tax.

I believe it's the climate that makes things deteriorate much faster here than in Europe. Heat and humidity. Don't think IKEA sells anything here that's not sent everywhere else. Most made in China today. 

So better think where we place the furniture, chipboard are OK in many places but not all. I had a cupboard door in the washing room loose part of it's surface coating due to Wife  splashing water around a bit too much. That probably wouldn't be a problem in a dry climate as it dries up fast but here it did cause a problem.

Modern freezers has so good insulation that it doesn't matter much if keeping it inside. Doesn't have the outside condenser either anymore that could collect dust. They are not using much power/generating heat if kept closed. When opening door, exchanging air inside they need to run. A chest freezer will not exchange much air with a top lid so warms room less than a normal fridge/freezer.

https://www.worldcocoafoundation.org/blog/cocoa-through-the-lens-a-chocolate-revolution-in-thailand/

https://bartalks.net/the-thai-cacao-struggle/

I bought the Chumphon 1 variety for 25B or 40B each depending on size from farmer in  Chanthaburi .

I bought one of the Chinese small chain saws a year ago. Recently ordered 2 new chains for it. Paid around 1500 for it on Lazada. They are around 1000 now. It has a 6 AH battery that lasts a few minutes actual cutting time. Cuts branches sup to 50 mm without problem. I would buy another if needed, but with 2 batteries instead. Thought it was a toy but it works OK for small cuttings. Do not buy any machine with smaller battery! Greenworks seem to have the same battery connection as mine, but fewer AH. For a chainsaw 6 - 10 AH is necessary or it will spend most time in charger.... You need 2 batteries. and you don't need longer blade than 4-5 inches, it will never cut anything thicker. Just unsafe climbing trees with long blade.

Vowen geotextile on Lazada. There are also thin carpets sold on Thaiwatsadu etc that will work. I used that for leach fields. Helped a friend make open drains around his house some years ago. He found some square concrete half pipes that were 150mm if I remember correctly. I think they were meant to be put together to make form for concrete post, but were perfect for this. There is also thin walled concrete round pipes that can be cut lengthwise with a diamond disc on angle grinder. 

I would suspect there is a leak in the roof material that allow drops to keep the board wet and make it moldy. Suggest first check roof for leaks. Can be further up the roof as water tend to follow beams and drop off at another point. If this is the only moldy place that is the most probable reason.

I would suggest https://www.isaanlawyers.com/. Based in Korat it's close to Surin.

No turning, just push hard in the middle until you hear/feel a click.

Cover it with a black tarp or something light don't penetrate. Leave for a months or so until grass seeds in surface sprout and die. You got seeds in the earth and they will come back again as soon as you disturb the soil. If planting you do NOT disturb soil and let new grass seeds germinate. Try covering with grass clippings or similar instead that don't let light through, then new seeds don't germinate.

You can plant lemongrass around your plot, that will keep the under ground roots away. Lemongrass have deep roots that work as a barrier keeping unwanted grass out.

Learn to live with it, you can't eradicate it.....

If you hot compost the manure it will be safe. The composting process locks in the chemicals. Growth hormones and antibiotics are probably used also in the big chicken farms where manure in bags come from.

Explanation here: https://deepgreenpermaculture.com/diy-instructions/hot-compost-composting-in-18-days/

I'm doing it, it works great if you get it mixed right.

Cow manure is regarded better by the fruit farmers here but almost twice the price per bag.

They are a mix of cement and wood dust, so things will grow on it. The surface will probably degrade with time and look dirty at least. A quick paint over with roof paint should take care of it and avoid future problems. Water base fast drying, put on before taking them up and screwing them on.

You probably are aware cement/wood mixture don't have the strength of real wood and thus might need closer spacing of beams etc. All depending on the construction...

I rented a house with a wall vent fan in bedroom a few years ago. It does cool down a little during night. Of course not like A/C but in some situations it can reduce temp enough so you don't need A/C. It all depends on the local situation. I had a mosquito screen in window and fan in wall beside it. Turned fan on at sunset when temps drop and room was cool enough at bedtime. This was during winter Rayong area, in April it would probably not be enough.

I had problems earlier with transplanting them. Since I started sowing bags with a mix of compost and rice husks it has worked better. I let them grow to 20-30 cm and roots in the whole bag before touching them. Papaya are known to be difficult to plant out. When planted out give them some shade the first time during mid day as the sun can burn them if they were in a shaded area before.

You can easily set the on/off pressure yourself. Take the lid off the black box on the side, inside you will find the pressure switch. It might even be instructions inside the cover how to do it. You set the max pressure and the difference between max and min. I have the same pump and set mine to work between 2 and 3,5 kg pressure.

Stay away from epoxy, it don't last long in the UV radiation here. I painted the best Jotun marine epoxy topcoat on some steel, it lasted less than a year before going chalky. Wasted money/work, a cheap oil based paint would have lasted longer.

Polyurethan for outside use is the way to go if you want a hard surface. I have used Epifanes here but that was long ago. Don't remember but maybe I found it in Langkawi. Could be available in marinas in Phuket or Pattaya.