Tippie students without a Graduate Assistantship can pursue Teaching Assistantships (TAs) with the College of Business (COB). In general, TAs are awarded by the marketing, finance, management sciences, and management and organizations departments; they are not awarded as part of financial award packages that are provided at the time of admission by the Tippie MBA.
Most TAs are offered to second-year students. TA appointments are not generally available for students in their first semester, but are an option for Spring semester and beyond. Department secretaries are the starting point for inquiring about TAs (the links in the previous paragraph will take you to department contact info).
Additional need-based financial aid, including student loans, is available for U.S. citizens. Inquire about loans through the UI's Office of Student Financial Aid.
"Financing Your B-School Degree" on MBA.com includes helpful information on different funding sources and computing the amount of money you may need to borrow.