The university of Iowa is predominantly white, as an African American female, will I have any issues

Colleges & Universities University of Iowa
6

Also, try the AA board.

For example,

http://talk.collegeconfidential.com/african-american-students/1509824-does-the-amount-of-black-students-im-your-school-phase-you.html#latest

Watch UI Youtube videos to get a sense of the school to see if you would feel comfortable there.

I agree that is a lot to pay. What are your stats maybe we can help you find a comparable school for less.