@Phil *******
okay I deleted the b/s out of this post.
You CAN indeed apply for an in country 90 day Non-O visa based on marriage to a thai at most immigration offices. You need between 15 and 21 days left on you current entry stamp (either the 60 day entry stamp you got from the METV or a 30 day extension from one of those entries).
You show proof you have transferred IN to the country from abroad into a thai bank account in your name only 400K baht, and you provide the required documentation, pay 2000baht and the application goes under consideration from between 14 and 20 days (that's the reason you need those days left on your stamp) Then you go back to the immigration office and get the 90 day stamp and the new Non-O visa inked into your passport.
Two months after that you go apply for a year extension based on marriage by showing the 400 baht has been in your account for 2 months and turning in the required documentation.
IF you meet the financial requirements GO to the immigration office and get the hand out listing what you do to get the in country 90 day Non-O visa