I took a look at a few places, and did my prechecks with my company.. Because im already an expat, working in Azerbaijan I have to have approval from my company to rotate to a third country.. Due to tax implications..
The company will only allow me to live in a country that has company owned assets there... So Thailand was the only one that had that, and to me.. its just a hub im going to use
as for Chiang Mai... Its a bad ass little place, and I quite enjoy northern Thailand.
as for living costs.. I have many employees and friends that live there.. and most are quite comfortable living on $1500 USD a month... and this is with Thai wives and kids.... I can pay for a good nice living there, and just live off my tax incentives.
I do have a friend who lives of $600 a month..... he is on the FIRE plan as well... He makes 200k a year, and spends 12k a year total... but he Is down to his last 18 months or so till fire... He is gonna go crazy once he is done lol