You also check for new DTV Visa where you can stay upto 6 months at a time. and valid for 5 years and who knows by 2026 things will be more lenient. as many suggested you do a test visit few times before 2026 before making final call. You could also consider Cambodia or Laos - Cambodia has retirement visa, Laos doesnt have retirement visa as such, but easy to get long term visa. Laos and Cambodia hospital services are not so great compared to Thailand, but worth exploring because of the kind people and prestine nature and laid back living.