I’ll add one other comment from further down the road. My D is in the last year of graduate school in music. I would suggest that your son (with parental assistance) take a realistic look at life after graduation and his personality traits.
People tend to look at life after graduation as black and white. Business school is a guarantee of a good job and happiness. Music school is not. That’s not true so scratch below the surface.
Both routes give you a bachelors degree. And long-term success has more to do with your son,s personality, ambition, work ethic, passion etc. If he is very money focused and likes stability a music career could be tough. Also if he has not been exposed to an artistic lifestyle that could be a rude awakening. However if he has spent time around working musicians/engineers, understands the hours and money, can hustle, and just has a drive to be in music, then he is going in with eyes wide open and may make a happy, fulfilling life for himself. Maybe better than cubicle land at a job he only kind of likes.
Most parents struggle with these questions. I’m much more comfortable now bc I see my D getting hired. There is work. But you have to hustle continually. But there are a lot of connections and camaraderie and happiness too.
Good luck!