Based on your son’s interests in water, here are a few more places to consider, all of which are ABET accredited for engineering.
These are some publics where I think your son might receive some very generous merit aid. Virginia publics aren’t known for being overly generous, but I’d suspect your son could get one of the top scholarships at Christopher Newport or Old Dominion. The others would probably at least grant an out-of-state waiver, and again, a top scholarship is definitely an option. A graduating senior with lower stats than your son found that Hawaii was one of her family’s most economical options. So I think odds are that these schools may well end up in your safety budget.
• U. of Delaware
• Christopher Newport (VA)
• U. of South Florida
• Old Dominion (VA)
• U. of Hawaii
These are probably safeties in terms of admissions, but not necessarily in terms of finances. But I suspect that your son might receive some very generous aid at these and could be a contender for the top scholarships.
• U. of Miami (FL)
• U. of San Diego (CA)
• Seattle U (WA)
• Florida Institute of Technology