@Julane ******
you got your wires crossed a bit
as people pointed out you need to get FIRST a 90 day non-O visa issued and THEN you can apply for the yearly extension AND you need to have a minimum of 15 days left on your current entry stamp (tourist visa/visa exempt or a 30 day extension from one of those)
This is how the time line works:
1 - transfer in the 800K baht into a thai bank account in your name only
2 - go apply for the 90 day Non-O visa (2000baht)
wait the 14 day under review period
3 - go back get the Non-O and a new 90 day stamp inked in
4 - wait until your 800K baht is seasoned the 2 months required and you have 30 days or less left on your 90 day stamp
5 - go back apply for the yearly extension (1900baht)
That's the time line of how you go from a visa exempt entry to Non-O and then a year extension.