I think there are an awful lot of colleges that will allow him to do that. He doesn’t have to be practical yet either! I understand the impulse but thinking about that too much can actually impede opportunities. He can choose schools based on location, size, academics and “vibe” and see what happens 
If he wants a conservatory, that makes choices more complicated. He can look at U. of Puget Sound which has a BM program http://www.pugetsound.edu/academics/departments-and-programs/undergraduate/music/for-prospective-students/programs-of-study/ and they have elective studies in music business http://www.pugetsound.edu/academics/departments-and-programs/undergraduate/music/at-a-glance/degree-nondegree-programs/ (scroll down). It is one of the Colleges that Change LIves.
The Colleges that Change Lives website and fairs (and book by Loren Pope) may be a great resource for him. If you haven’t, try googling it
University of the Pacific also has a music school with a degree in music management or a minor in it. http://www.pacific.edu/Academics/Schools-and-Colleges/Conservatory-of-Music/Academics/Degrees-and-Programs.html
I have heard good things about Lewis and Clark and Mills. There are the Claremont colleges (Pomona, etc.) and of course California has excellent UC’s, and state colleges, some of which have excellent music schools. Herb Alpert in LA?