Bangkok bank will update the bank book at the counter with a CF line (carried forward) dated on the day you do it. I'd did mine in the morning of presentation to the IO and it was accepted as proof of current balance updated on the day. This was at Surin. May not be acceptable at all IOs
At Buriram Immigration office we went to get Thai passports for family. They wanted proof of vaccination. Just showed them Mor Phrom app vax status. All good.
you are required to report your address via TM30. However, I don't know if you have noticed how quick the police catch up with someone if they really want to.
Go to your local public hospital. The records are in the national health system. Takes a few days, then you collect. At least that is how it rolls in Hua Hin.
Kap Cheng, Surin IO actually asked me to go to Retirement extension from an ME Non-O Spouse visa when I was seeking a Thai Spouse exemption. He said "less paperwork for you and me"