@Dave *****
, there are TWO ways you can meet the proof of funds requirements for a yearly extension of stay based on marriage to a thai
One is banking 400K baht in a thai bank account in your name only for 2 months before you apply
The other is by getting a letter from your embassy stating you get at least 40K baht a month in income from abroad OR if your embassy doesn't issue that letter (like the US, UK, and Australian consulates that stopped) by transferring into the country from abroad a minimum of 40K baht each month, every month for the previous 12 months before you apply for your extension