@David *********
keep in mind that if you do it as David suggest you will need to get a police report, and health insurance, and a lot of other documents. Life will be much easier to follow Mike’s advise. 60 or 90 day visa to come here then go through the process to get an Non -O retired inside Thailand. (As apposed to the Non-OA you get in your country) again O-A’s require insurance.