AIB College of Business
It's located just south of downtown Des Moines on Fleur and Bell. It's in a relatively nice area of town. I didn't go there...so I don't have much to say about the actual school. If you want to be in Des Moines, Drake (located just NW of downtown) and Grand View (north east of downtown) both offer bachelors degrees in business. Don't be put off by the tuition, apply for financial aid and see what you get. You may be surprised (I know I was).
http://www.gvc.edu/
http://www.drake.edu/