Bangkok bank was easy, but may get you with a health insurance at a grand or so ,hard to get just now ,try to get it first thing,as new rules about opening up one now ,you need to start doing the marriage first thing too 400,000 buats in account for 2months for visa extension ,you need an, afamation of freedom to marry,from your embassy, when you get out of the embassy you need to register it ,ministry of internal affairs, with a bit of luck, there might be someone outside the entrance looking to help you get it registered( it takes about
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days to register it )for few hundred bauts, as I did ,in all you have a lot things to do, but in all, well worth it