@tsbna44 is not wrong but you might learn something from their journey. If I remember correctly they also had a special needs child and how colleges factored that in varied wildly.
If your S doesn’t know what he wants to do and a LAC is appealing maybe take a look at some of the Midwest schools. We found that several of them offered significant merit.
Also, is it fair to assume he has a strong SAT score? I think there are several schools that offer guaranteed merit based on those.