I’m Australian living in Thailand under a full retirement visa, you need to report your location every 90 days with a TM30 form if renting private residence. All holiday accommodation are required to do this on your behalf regardless of were you stay. Just never overstay your visa
What country are you from, do you have 800.000 baht to put in a Thai bank account. Doing your application in your country is the best way but allow three months approval time. In country you can get a bank account and retirement visa with no problems for between 15- 30 thousand baht
I’m Australian living on Army war pension in Thailand on retirement visa,12 months bank statement proving regular income payments to the value in Thailand of 800.000 baht.
Us no problem but you will need proof of income from USA embassy in Bangkok if applying in Thailand or applying in the USA for retirement visa before coming