Hey Daisy-
I just asked my friend, he said that he actually hasn't been to downtown Buffalo in a year or so. So, he doesn't know of any hotels off hand, but he says the buses on Main Street (Is that where the school is?) are really convenient and pass by any hotel frequently. He also said that cabs my be more direct, but harder to access.
He said if you look up hotels, he can let you know the quality of the hotel.
Hope this helps you a little-
Chrsitine