@Geoff *******
> Is it possible to open and fund a Thai bank account within the first week on a 30-day Visa-exempt entry?
Yes it is. Different banks have different requirements, and you will be verbally rejected a lot. You *WILL NEED*:
1. A residency certificate OR a letter from your embassy saying you live at the specific address
2. Your passport and a copy of:
a. Your data page
b. Your visa page
c. Your entry stamp
3. A minimum opening balance (usually about 1K THB).
However, each bank branch has their own requirements. I recommend asking that question on a local Facebook group.