Does he not shit because he has to pay for a public toilet? If he wants to stay more than 60 days, buy the proper visa. Pay your way (not you, but the OP).
I encountered the same issues. ATM limited to 20k a day, transfers limited to 50k. You can do multiple transfers of 50k up to a maximum daily limit...
It's a pain, but not an issue except about 1 day every 8 weeks when i make a larger purchase. They gave me a temporary 30 day limit of 200k. Just have to wait on the phone for 30 minutes with their call center. The branch for Kbank doesn't seem to be able to do anything other than open accounts and take your phone to call customer service. This is one area where Bangkok bank was superior. But I'm not willing to have my account frozen with no communication or explanation anymore so i guess I'll live with restricted transfers.
of course. My opinion is that most banks don't want the hassle of dealing with foreign account holders. Way more paperwork for many, language barriers, etc. Bangkok Bank must have lost a huge number of customers over the past year and don't seem to care one bit.
Just get credit receipts for the foreign deposits from your bank. That will provide immigration the detail they crave. In Hu Hin. Credit receipts are required.
You don't switch immigration extensions to banks, it is done by the method. You could have the 65k/month go to either bank or a combination of both. You will need to provide immigration with 12 months of statements from both banks and credit receipts for each international deposit for 12 consecutive months.
Remember that making life easier for the IO will pay off in speed of processing and fewer trips. So I'd suggest all your 64k deposits be done at one bank.