I think if you have any extra slots unused and you can handle the workload, applying to a school like Ga Tech is ok - because with Stamps - it “could” hit budget. It won’t…but at least the possibility is there - whereas at Michigan or School of Mines, it’s not - if that makes sense.
Another strong aero school that’s a safety but with a stellar rep, a built in aero industry nearby, and would be in that $40K range - is Arizona.
It would be a safe choice - but given the largesse and success that the NMF schools have and you have other kids - I’m not sure any other schools will even come close from a lifetime ROI POV - not UIUC, not Purdue, not anyone.
NMF is the golden ticket, especially when you have other kids to pay for and limited funds.
Alabama, as an example, has amongst the most if not the most in the country. They are buying brilliant kids in - so your son will be in good company - really at any flagship - as those that buy kids in (WVU, Miss State, UAH) are very strong in aero and loaded with academically accomplished kids.