@Philip ***
you are confusing some conditions. You don't need to SEASON your fund for a couple of months for an in-country Non-O, you NEED your fund in your Thai bank account unless you can get the affidavit letter from your embassy.
This is the requirements list for an in-country Non-O visa (90days) being married to a Thai national in Bangkok for example.
******************************************************************
*******
/6.pdf