@Harry ******
THEN after you got the Non-O and go back to apply for the year extension you show that the 400K baht has been in your account for 2 months before you apply for the year extension.
You will get a 30 day under consideration stamp (during which time they usually do an in home visit to make sure the marriage is real) then you go back when that 30 day stamp expires to get the year extension inked in. AND some offices ask you to bring your updated bank book to show the 400K is still in the bank at that time too