Do I need to continue my 90-day report if I switch to a Non-O visa in Savannakhet?

There's a BIG difference in getting yearly extensions of stays at your immigration office based on marriage to a thai and going to Savannakhet and getting a year-long, mult-entry Non-O visa based on marriage.

For one, you would never need to do a 90 day report on the visa you'd get from Savannakhet because you can't be in the country longer than 90 days with it.

You have to exit/re-enter the country every 90 days to get another 90 day stamp.

As far as the paperwork you'd need, it'd be: copies of the marriage certificates, your wife's thai i/d, her house book listing, the data page of your passport and that's about it.

There are NO financial requirements in Savannakhet to get that visa.