Many music studio owners are accidental entrepreneurs. You show a friend how to play a lick on the guitar or the opening piano chords to Heart and Soul and next thing you know you have your first student. It feels good to pass on the tradition of music to someone else. It feels good to share your knowledge. If also feels good to get paid for your expertise. One student leads to another. Next thing you know you're making some extra spending money.
If you really want to take your teaching business to the next level you have to make a shift in your mindset. A shift from music teacher to entrepreneur.