Well, good luck.
I personally feel musical instrument performance degrees are more about pushing how fast you can learn things, than about playing well. As the top paid pianist these days started paying gigs at age 11 (Lang Lang) I'm not sure what a piano performance degree really buys you. I myself am now playing pieces I hear on master's recitals over at the city music college, and I stopped piano lessons age 14. But I don't learn pieces nearly as fast as the music school graduates. I think the speed of learning is natural, not something the schools really teach, so I probably would have flunked out of instrument performance college at some point.
OTOH, if you're going to start a music school yourself, having a business degree helps you deal with all the regulations you have to comply with (especially in S California) and maybe fill out your tax form yourself in the early years, saving $$$$. A performance degree equips you to work in somebody else's business for much less of the take. You'll find very quickly you can hire competent performance major graduates, cheaper than you can hire a business manager.
Starting and finishing something is a skill that all beady eyed bank loan officers look at carefully, so if you wanted a loan to buy the first pro level grand piano, or pay the remodeling crew to make this ugly cheap rental space suitable for artsy customers, think that through. After all, you are halfway there to the business degree. OTOH, if you were winning contests one after the other age 16, then maybe you have a piano performance career in your future. I think gigging with a pop band is more surely remunerative than the classical music route, but traveling on the road in a van with 5-10 guys, 4 to a room, is a tough life, one you may get tired of at some point. Carol Wunderland has no options but the road: she dropped out of high school to persue public performance. You do have some normal employment options, as long as you finish something you can show a bank loan officer or a employment office interviewer.