From their own website with a quick search $38,100 is pretty much $40,000.There are additional expenses living and going to school in general. Cost Comparison | Electrical & Computer Engineering | UIUC
I have known too many people going to this school and that was at least their avg. This is why many kids go out of state for merit and scholarships.
One thing not disccused is going to community College for 2 years then transferring over. Chicago and Chicago suburbs have some really great community colleges that their classes transfer easily.
Another thing not mentioned is UIUC take AP from 3 and up. This poster seems to have a good amount of APs and that might be helpful in this journey.