Yes there is public transportation, check you packet 'how to get to Case'
I stayed at La Quinta, but I rented a car (well I ended up with a mini van) anyways La Quinta was about 10 minutes, by car, away from the school. I heard most of the hotels by the school are pretty trashy-there are two schools on the campus, the names are in your packet, which seemed to be pretty nice, but where booked for my dates--good luck on your interview