Nothing to do with what i can afford. In fact your statement is a bit dumb as i would obviously have the money if i put in the bank. Putting a few grand in a bank is not an issue for me. Why pay somone to falsify something that may risk my ability to stay in the country when i can easily do myself and ensure that there are no comebacks.
I constantly see people on here talking as if 800,000 baht is a huge amount of money. It isn't really is it, if you are worried about the interest on that much probably best find somewhere else....