Retirement questions

So i hope to apply for tr visa or visa exempt with the intention to apply for 90 day non o visa then ext of stay based on retirement

Coming from Honolulu usa!

Estimated travel date end of March!

I've just completed 3rd transfer using transferwise to achieve the requirements of 800,000 in thai savings acc my name!

I only had an account with K BANK

So my question is besides 2 months seasoning will i be required to show origin of $ from usa?

I thought i understood not necessary, but now not sure!

Unfortunately i didn't have a Bangkok bank acc!

I've searched and have seen several post that main office of K

Bank can provide a letter stating funds originated over seas

Can anyone verify or advise what possible options are available!

As everyone knows a lot of conflicting information, so hopefully someone will give me some guidance so i can start the travel arrangements with confidence! MAHALO