Your parents have assured you that they can pay up to $70,000 per year (or what the net price calculator at each college says) for your education?
As an engineering applicant, UIUC, GT, and Michigan may be harder to get into than you think. It is better to find an affordable safety where admission to your major (or a similar one like mechanical engineering) is assured, to avoid the possibility that your only admission is to UIUC in the Department of General Studies (from which it will be very difficult to change into any engineering major).
Chicago does not offer mechanical or aerospace engineering or undergraduate business, so remove it from the list.