Some people love music so much that they are happy making their living any way they can involving music, including teaching, playing weddings, and other functions. I've done a lot of this, and ultimately am not happy doing it.
Even though I loved touring as a musician, most of my friends that made their living touring have retired from it and gone on to do something else, as the road life makes it pretty difficult to have a "normal" family life.
I've often asked myself what I'd want to do if I weren't a technologist, and I always come back to doing something with my hands.