No worries. It sure beats paying an agent 20,000 baht each year for the rest of your life. I pay 1900 baht every year for extension. The only thing is you must keep up those 65k international transfers every single month, even when you're out of the country
You can get an OA visa in the US, enter on that, which will give you up to two years without needing the 800k. During that two years you commence the 65k international transfers each and EVERY month. By the time you reach the end of the two years you will have at least 12 months of 65k transfers. You do an out/in, come back on visa exempt and apply immediately for non-O retirement visa using your record of 65k transfers. Best way to avoid the 800k lump sum