Not trying to be a smartass here...
I haven't played live original music in a long time, but that used to be a decent revenue generation. Especially once you could draw enough attention to make a DVD worthwhile. Has that changed?
What about music sales?
I thought about crowdfunding to pay for the mixing and mastering of my next album, but then realized that I had a product to sell (my last album) instead.
Just thinking that having a product to sell (live performance, MP3) would be a better revenue generator than a possible future product.
To me, it seems like he difference between giving my money to a panhandler vs a busker. The busker is selling something, and much more likely to get my money.