The first thing that came to my mind, is that even if you took up flying commercially, you can still enjoy music. I know you wouldn't be making a career out of it, but there would be nothing from stopping you from playing it and enjoying it - to your hearts content. I cant offer advice on any costs I am afraid as I dont know, but someone else will post.
Best wishes with whatever you do,
Maz
fantatsic pprune name by the way!