Okay, lets sort this out right now.
Despite what you've managed to dredge up from the inter-web, there are three consulates in S/E Asia that will sell year-long, multi-entry Non-Immigrant Type O visas based on marriage to a thai without any proof of financials.
Those thai consulates are the ones in Savannakhet Lao, Ho Chi Minh City Vietnam & Seoul South Korea.
In Savannakhet as far as documentation you need;
- the original rose bordered marriage certificate (if married in thailand)
- You need copies of:
- ft&bk of the marriage certificate
- ft&bk of thai wife's i/d card
- thai wife's thai house book listing
- data page of your passport
- Lao visa
- entry stamp
You sign everything with your name or out of your passport and your wife signs everything wtih her name on it, <- meaning you BOTH sign the marriage certificate copies
Those things along with 2 -passport sized photos a filled out application and 5000baht will get you a year-long, multi-entry Non-Immigrant Type O visa. That's the kind where you leave the country every 90 days and border bounce <- go to a border, stamp in&out of another country, and right back into thailand to get another 90 day stamp. You do that for the validity of the visa (a year from the date of issue). You can get almost 15 months in country out of that visa.
I admin on a f/b group that has 23K members and ONLY deals with visas and extensions for thailand.. I can say my information about Savannakhet (and the other consulates too) is spot on & 100% accurate.