I have a relative who’s doing graduate work in music technology at NYU. Not sure if that would be too expensive/intense for your S but it seems to be a pretty well regarded program and it’s in the city. There’s also a music tech program at SUNY Brooklyn College. As a high schooler, a program like this might be a way to test the waters next summer: http://steinhardt.nyu.edu/music/summer/simpt (I noticed that they offered both a housing and commuting option).