Are you looking for one close to the school but still reasonable? There's actually a hotel on campus called the Reitz Union hotel. It typically starts at like $99 depending on when you come (make sure its not a game day weekend or I'm sure they'll be booked!) You'd most likely be able to take the bus from these hotels to the dental school. I know a really reasonable hotel is the Super 8 and it is near the interstate, it is probably about $50 a night. Let me know if you're looking for anything specifically and I'll try to help you out
Congrats on the interview!