Okay,you don’t want to be looking at OOS public universities. They are expensive for OOS students, as you have figured out, and don’t usually offer much FA to OOS students. You could look at University of Minnesota, which is cheaper than many OOS colleges, but likely it would still be too expensive if you are low income. If you want the large university experience, than your best bet probably is to go with your in-state options. Remember (1) your state flagship is a BIG school, and you would rarely see anyone you know if you went there, and (2) you can always move out of Illinois after you graduate.
Regarding your stats, your ACT is pretty good, but your GPA is weak if you want to apply to private schools that meet financial need. That is a bigger concern than your ECs, IMHO. Do you have any hooks you haven’t mentioned (for example, are you an underrepresented minority?). Also, what do you want to study?
Also, do you know about net price calculators? They are on each school’s financial aid webpage, and they give you an idea of what your cost of attendance might be for each school. You will want to run those for each school you are considering.