If you have a BA you can get a job as a teacher with a Non B Visa. You can get your Visa renewed based on a marriage extension when you stop working. But you can also work on a marriage extension as well. You can get a retirement extension as well but you can’t work.
You require no money in the bank for a Non B and work permit. 400,000 baht for a marriage extension and 800,000 for a retirement extension.
MOTS, they will also do your 90 day for free. So unless someting else pops up, using them you only need to go to immigration once a year for 10 minutes to get your photo taken for the retirement extension.