If he wants to play music in college in an orchestra he will have a lot of choices as a non major. At the Ivies and some other elite schools that don’t offer music performance majors, they recruit talented musicians and are very proud of their student orchestras . My son went to Juilliard’s pre college program and about half the kids there were aiming to get into an elite school and that is why they were doing music (the admittance rates to incredibly selective universities in my son’s graduating class from there looked like a prep school). The ivies at least will also pay for student lessons as well.
Other universities that have performance majors may not allow non majors to be in the orchestra with majors, but they often have orchestras for non majors as well. NYU when I went there in the dark ages had kids majoring in music in the school of the arts, but they also had opportunities for non majors (I bowed out, because to say I stunk would be kind:)