Check with the Immigration office for their requirements. For the initial 90 day Non O, didn't need the money seasoned for two months. I only needed it seasoned for the 1 year extension. You can DM me if you need too.
sorry was at the hospital. You should be good to go. You can get married once you get your passport and Affadavit done. I assume you are here on Visa exempt, if so get your 30 day extension at Immigration. I don't know how long it will take to get married though. Some people say they had to wait weeks to get an appointment at the district office. I never did make an appointment, we just went to the district office in Khon Kaen, gave them the paperwork and was legally married the same day.