How long to get bank account on DTV?

[DD25]

I have a plan to pester my previous employer for some consultancy work that I can do remotely and then get a DTV. This would make me tax resident in Thailand from next year. In the meantime I am sitting on money from a house sale, so if I can open a bank account this year (when I am not tax resident) I can shift enough into Thailand to last me the 5 years, and won't need to remit anything while tax resident.

 

I can't get the DTV until I've agreed something with my old boss though, and I don't think I can open a bank account until I have the DTV. If I can complete those steps by say 1 December, is it realistic to open a bank account by say 15 December? It's clear that DTV holders are supposed to be able to open bank accounts, but with it being a new visa type (and basically a tourist visa) I am not sure how practical it is going to be. Does anyone have any experience they can share?