or get the 30 day tourism extension to get to 90 days and hope that the Immigration Office where his TM30 is filed will then do a 60 day Visit Thai Family extension on the back of a tourist entry stamp
Does your eVisa expire on 26-Dec or is it your current permitted to stay date stamped in your passport? I assume it is your permitted to stay date so what date does your actual 6 month METV expire?
If you start transferring 65k per month by international transfer before you get your first extension you will have 12 deposits to use by the time the application for your second extension is due and not need to top up to 800k again and can withdraw the remaining 400k when the second extension is approved.