You said that he is going to transfer money, so lets see if he gets around to doing it.
Personally, $100 is quite a lot to be lost (ok, I'm poor, I know).
I don't think anyone should be treated in this way from a tutor- who is supposed to help you. If he is the busiest person, why is he saying he is tutoring and bringing your hopes up?
The bad experience with tutors stories are making me quite sad because in high school, you're made to look up to people with these high marks. It really questions if high results = a good tutor