yes, I thought I already said that non O done in Thailand has no medical requirements, The Oa is done at home and you can keep the money in the US, but it also are requires the medical insurance
so while you are in the US you can get a 90 day visa with no health requirements. I thought this visa was called OA and I know that has the medical requirement.
we may be mixing up their terminology. If your are handling the visa in Thailand, you enter Thailand on 60 days, then apply for an initial 90 Non-Immigrant O visa which can then be extended for the annual visa.
If you’re a US citizen, the embassy won’t verify your income source, so for the first year you’ll need the 800k in the bank. You’ll make monthly deposits of 65k for one year. Then the second year your can convert to the monthly income method. But as someone already stated, when you’re ready to retire here check for the latest rules.