DrJack54

In my years (way back) of border/visa runs, I would fly from Bangkok to UT and stay at bar area just behind central plaza. There is mini van from front of plaza to Friendship bridge. The taxi from airport to Udon Thani is now not a rip off.. Some tips are posted in attached thread https://aseannow.com/topic/1289254-laos-border-bounce-via-udon-thani-nong-khai-report-questions-hiccups/

Your plan looks fine. Out of interest is the plan to fly Bangkok to Udon Thani?

No

From another thread asking about changing from money in bank method to income method here is a cut and paste post from ubonjoe. "You will need to keep the 800k baht in the bank for 3 months after you apply for your curren extension and then 400k baht until you apply for your next extension using the 65k baht income option."

Some suggest 800/400/400 is all that required. As a "cover all bases" I'm planning on doing 800/400/800. The reason being that if any issue with income method (,eg pension certificate) etc.,..then I have fall back option of continue with funds in bank method

Exactly what I'm currently in process of doing. Using funds in bank method and from date of last extension have been making monthly deposits of 65k+

The OP indicated 20 days early and that is plenty to allow for any slip up When the non O and 90 day permission of stay is given the normal process is to apply as early as 30 days remaining and 45 at some offices. Agents do it in one hit. OP is not using an agent. The plan he outlines is sound..

Thanks for the update. However others note that TM30 is often required for 30 day extension. Like many things at immigration it's luck of the draw.

When you apply for 12 months extension based on marriage you are given a date to return.. That can sometimes be eg 4 weeks away.. Refered to as under consideration period.

Read several times ...no idea what you are staying. The OP has indicated that plans border bounce.

Think you will find top up to 800k not required provided 12 month transfers can be provided. However good back up to continue funds in bank method if any issue

Can you point to a multi entry non O from HCMC in recent times. I have seen denied applications at Hanoi. Some comments re HCMC in attached thread. OP, have you considered Savannakhet. https://aseannow.com/topic/1308373-ho-chi-minh-multiple-entry-marriage-visa/

OP, I agree with above post. You do realize that for the 12 month extension the 400k only needs to be in Thai bank account in your name only for 2 months plus under consideration period and then can be spent. Thinking a single entry non O and subsequent 12 month extension is a good option. + A reentry permit if you plan to exit Thailand.

imo You could just border bounce which currently provides a 60 day permit. Which is extendable by 30 days. Then obtain non O marriage. Then subsequent 12 month extension....OR Depending on how long you plan to stay you can obtain 60 day extension to visit wife.

Is it the financial requirements that rules out non O based on retirement and subsequent extensions. Simple alternative

No. Non O based on dependant Thai child is possible when not married. eg divorced. You indicate still married. Immigration will want you to obtain non O based on marriage and subsequent extension along with the required financials

You most likely/certainly will not be able to obtain non O based on Thai child. You will obtain non O based on marriage since you are married to thai national. You will need 400k in Thai bank account in your name only 2 months prior to application and maintained during under consideration period. Forget non O (Thai child dependant)

Off topic post removed. Further off topic posts removed without warning.

The OP, is currently married. He would need to apply for extension based on marriage

Extensions from a non O or non O-A based on marriage do not require insurance.

Most likely the document check chicks will send you away without TM30. Your wife does not need to be with you. This thread lists other docs required. Photocopies etc https://aseannow.com/topic/1324628-30-day-extension-to-visa-exempt-entry❓/

First up how did you enter Thailand. If visa exempt you will attend IT mall LakSi. If with a visa eg SETV you will attend CW. Most likely you will need to provide a TM30 Edit: you only received 30 from dates mentioned so you go to LakSi

As I pointed out earlier ...that would be an option if he has previously not obtained the 60 day extension. Also he would only need a single reentry permit to protect his permission of stay for trip to UK during the 60 day extension

That would be up to 30 days early. Since your immigration office is helpful and friendly, suggest you see them asap to discuss options. Immigration offices can process your application earlier than stated rule. Showing them flight ticket to UK would help. Just go to the horses mouth so to speak. Edit: if you haven't used your one 60 day extension to visit wife, immigration may suggest that.

Which immigration office