For the costs, are we talking merit aid or financial (need-based) aid or both? Makes a huge difference as to where you can afford to attend.
Having said that, St. Olaf would be a dynamite fit if you can make it work on the money. World-class music program, very strong academics, terrific grad school placement. The second I read your interests, that was the school that lept to mind. And it is in neighboring state for decent geographic proximity.
But you will not be able to drive the tuition to $15-20K per year on merit aid alone…