It's not very different and I used another account earlier. That account I used for daily expenses and for immigration. Just some copies from that bank book for a total of maybe 10 baht/year at Kodak Express. Plus the bank letter of course.
Why do you think a lot of expats have more than one account? I'm using my FDA at immigration and I just need 2 copies from that bank book + my bank letter.It can't get easier than that.