I work on campus as a network consultant...I work 9 hours a week plus whatever extra work I do on my projects...so usually ranging from 9-15 hours. The first two weeks of school I work about 100 hours combined doing sign-up and set up, but my job is pretty cake...I fix things that are broken.
It's also great job experience too, and pays well. I don't think I could have handled working off campus, I would have only wanted to work in the mall, which is a half-hour away (and over the Mississippi, which I would be deathly afraid to drive over in snow.)