$45K/yr would fully cover the cost at Purdue, a top 5 Aero school. $22.5K/year would require assistance. They have merit aid, but your second SAT would probably need to increase to hit one of the high value ones.
UIUC is at roughly the same program level, though the total cost of IL in-state isn’t that much different than Purdue OOS (I get $19,372 per semester in-state Aero, next Spring).
Alabama’s Total Cost, less the 1340/3.5+ scholarship, is still about the same as UIUC in-state (53,364 - 15,000), though another 20 points on the SAT would bring it down under $30K.