So UIUC is an option through pathways but the community colleges listed like Oakton FYI is not a blow off easy CC. They are just tough enough. 3.5 could be a struggle to get. Pre engineering if taught correctly is not easy at all but it is an option non the less.
ISU is a great school. Email /call about Co - op as mentioned. If you can work your way through school. Also yes many ISU will get 2 internships and they pay well so that’s a means to pay off loans or to your grandmother.
If your worst case scenario is ending 4 years of college $50,000 debt, for engineering I would take that deal everyday. Just extend graduation and do a few co-op or internships till you pay them off and you get great work experience to boot which makes you more marketable… Which could give you a higher starting salary.