Without the assistance of Priceline, the cheapest hotel on I-Drive seems to be the Rodeway Inn. They generally have rates from $45-$60 a night, depending on the time of year. The rooms are kind of small, though, and the furniture looks like it is stuck in the 1970's, but the room was clean. Personally, I try to avoid I-Drive north of Sand Lake Drive. Traffic can get horrid during the evening and night. If you want to say a little further west on Universal Blvd., the Clarion Universal has gotten good words overall. You can get it for around $50-$60 a night on the hotel discount link on this page.