Below are some additional options your son may want to consider:
U. of Maine: About 9300 undergrads. Your son would be eligible for the flagship match (i.e. matching UVM’s tuition price), and if he applies by December 1, he may be eligible to receive an additional $3-5k “Early Action Award” (source). So if the professional review at UVM does not come back favorably for free tuition, this would be another option.
U. at Albany (NY): About 12k undergrads and they offer a flagship match as well (source). In fact most, but not all, of the SUNY schools offer a tuition match for Vermont, and the SUNY schools are having free app weeks from October 20-November 3 (source). Another public NY option to consider would be SUNY-Plattsburgh which is not far from Vermont but has some very well-respected business programs. It has about 3900 undergrads, which is a size that a lot of students tend to like (not too big, not too small). Another campus he may want to consider is Oswego with about 5700 undergrads. Although it’s not a tuition match school, your son may want to look into U. at Buffalo as well (about 20k undergrads). Additionally, some of the campuses may offer additional scholarships on top of the tuition match (whether for pure tuition or for room & board, etc.).
West Virginia U. has about 19k undergrads, and your son would probably receive their Level 2 scholarship of $14k (assuming that your son’s unweighted 3.6 would be above a 3.8 weighted, which is what WVU uses), and that can stack with other scholarships (source). But with the $14k, it would bring the sticker price to right around $30k.
If your son takes a look at some of the TE & other colleges that have been mentioned and lets us know what resonates or repels, that would be great, as it can help posters to suggest options that might better suit his desires.