As far as im aware, you can open normal thai currency accounts, but I dunno how many banks are multicurrency over here. They're the local banks (krungsri? bangkok bank?). Maybe setup a Wise multicurrency account and a local thai account and just transfer between them.
I'm trying to find out the tax implications myself as well as its really unclear. From what I read, with the elite visa you're just a regular resident, but not for tax purposes (i THINK. in some circumstances, you can pay tax apparently)
I'm thinking of getting a consultation next week with these guys
Thai Elite Visa (Updated 2022) | Siam Legal International to see if they can answer my questions. I havent done full due diligence, but Ive seen them around for the past 10+ years, so there should be something to that as well.
-Skenners