Given the very strong architectural cred but desire for more of a structural engineering career path, has he considered architectural engineering as opposed to civil? Schools that offer both, and thus keep that option open (or just provide more arch-related electives if he chooses CivE), could be a plus. UT-Austin and TAMU are two that have both majors; Alabama, already on your list, is another.
Missouri S&T could be a good one to look it - it’s quite affordable for OOS students and also gives merit, and it has a top-notch reputation for engineering. Civil, Architectural, and Environmental engineering share a department.
If a co-op model would appeal, U of Cincinnati could be worth a look - they have some large scholarships. CivE, ArchE, and Construction Management share a department.
Flagships with ArchE that might give enough merit: Oklahoma, Wyoming, UNL. Kansas State is another that could be worth a look.
Of course, I’m filtering for a criterion that may not be important to your son after all; but I think it’s worth considering whether keeping ArchE in the mix would have value. @MaineLonghorn is our in-house resource on this topic 