@Michael *******
another option is to see if she'll give you copies of her thai i/d, her house book listing, write a short letter asking a consulate issue you a visa and go to the thai consulate in Savannakhet and get a year long, multi-entry Non-O visa based on marriage for 5000baht without the need to provide proof of funds
You would have to bounce out and back in on that visa every 90 days BUT even if you got divorced during the year, your visa would still be valid and you could get almost 15 months out of it by bouncing out and back.