30k to survive
40k to live comfortably
50k to thrive
Don't know why you need that much in a country where the average Somchai survives with 10k a month. 5 times that should suffice no?
Food is not expensive but of course if you go to Tops and friends it's expensive. Just eat breakfast from 7-11, lunch from an ordinary Thai restaurant and if you are in Pattaya a plate of pasta from an Italian restaurant in Soi Buakao is 100/200 baht. I think you won't spend more than 10k for food. 10k for another decent place to live in, 5k for electricity internet water, 5k for booze, coffee and all those things you don't really need. 30k for your basics... Add insurance, some luxuries let's say 10k. Then another 10k if you want the weekly farang restaurant, soapy.
50k for a single is a lot, at least for me.