This was another issue, I tried getting a "residence certificate" at immigration but they denied it since my TM30 was invalid. I'm staying at an Airbnb and the "owner" is Italian. I asked him for a TM30 and his co-host sent me one. When I gave them all the paperwork at immigration they said the TM30 didn't have the "title deed" or something like that. Now my only hope is to sign a year lease, bring that to Kasikorn Bank, and hope they let me open up an account. What a friggin headache.
I plan to use Kasikorn since they seemed to be the most receptive of the four major banks I tried. How risky is what you just suggested? Would I be safer just to transfer another 800k via wire transfer to avoid all potential denials from the immigration agent?