UIUC won’t work, but another Illinois public might. ISU, for example, has a total cost of $28,000 for instate, and your ACT score would make you eligible for a $6,000 per year scholarship:
http://admissions.illinoisstate.edu/freshman/cost/scholarships/us.php
A good program to know about is Midwest Tuition Exchange, where you’ll get a discount at other state’s publics, and a few privates. This usually does not include the flagships, but the University of Kansas is an exception:
http://admissions.ku.edu/cs#NonresidentFreshmen
so you could get $10,000 per year off an approximately $32,000 COA.
At the University of Wisconsin-Stevens Point, your costs would be under $20,000 per year:
http://www.uwsp.edu/admissions/Pages/Affordability/default.aspx
These are just examples; there are many more. The Midwest Tuition Exchange site is here:
Are you planning to retake the ACT? A higher score would give you more merit aid options.