Why would you want to use a US Bank if you are leaving the USA? I use Bangkok Bank for all my banking needs. My Social Security is directly deposited to Bangkok Bank. You can save a lot of money by not keeping a US address. Medicare will not pay to Thailand and you can buy good insurance in Thailand. You do have to pay Medicare if you have a US address. You do not have to pay Medicare if you use Thailand as your address. Medical is much less costly here and better than in the USA.
I was never asked by immigration where the money came from That account has much more than 800K. I also have 2 more accounts. Evidently, if we have enough Baht they do not question.
I said I do not own the land and I do not own the house. The owner died in 2018 and willed her assets to me. My name is on both land deeds. I can sell or will the land.
I would never buy a Condominium because you own nothing beyond the paint. Here in Thailand I own the house and have all rights to the land. Yes, my name is on the land deed. Yes, it is legal. I do not own the land and I can sell the land and keep the money.
The 800,000 and a retirement income is okay. I have been here 30 years with less than 65,000 per Mo. My retirement is directly deposited into Bangkok Bank.