you cannot get an extension based on having a Thai wife thru the VFS E-Extension system it is not an option for that program.
You can apply for a yearly extension at Chaengwattana when you have 45 days or less left on your current stamp (so for you any time after Dec 31st (providing your funds are seasoned the 2 months required)
You go out to the main immigration office at the government complex Building B on Chaengwattana Road, you go up to the 3rd floor (the floor above the main immigration office) and there's the 90 day report/TM30/Resident Certificate room
You need copies of
Data page of your passport
your most recent entry stamp
your visa (the print out of the PDF visa if you got it outside the country)
your TM30
you will fill out the form, pay 200baht, get an EMS Tracking number and they'll mail the certificate to you in about 5 days
You can get a certificate of residence in Bangkok on ANY stamp as long as you have a current TM30 filed showing you are registered as staying at an address in Bangkok
There are two types of term/fixed deposit accounts and they are viewed differently by the immigration office
One is a term deposit <- meaning the principal deposit is frozen (you can't access it) for the length of the term, all you can do is access the earned interest. < This type of account CANNOT be used for proof of funds for extensions
Another one is a fixed deposit <- meaning the principle is NOT frozen, and you can access it at any time during the term you have set up, (even if you lose interest or get a penalty) <- This type of account CAN be used for proof of funds for extensions.
you mean show up with the bank letter, statement, updated bank book, TM30, copies of your passport data page, visa, entry stamp, and a filled out TM86 change of visa application?
I mean if you showed up with ALL that stuff ready to go, (and the print out Dca Dca posted) it'd be interesting to see what they'd do