@Carl **********
, didn't you just get your O-A visa?
Unless I'm wrong you are almost TWO YEARS away from needing the 800K baht in the bank to get your yearly extension..
You only need the 800K baht in a thai bank account in your name for 2 months before you apply for your yearly extension AND if you use the O-A visa correctly you can get almost TWO years of stay from it so you're a good ways off from panicking about needing the money in the bank.