Coming from a pro, I think that if half of your income or more comes from music, you deserve to call yourself a pro.

On the other hand, I'm sure that there are some musicians who just work weekends, but make more per weekend than some of us professionals make per week. They work regular jobs during the week.

If you only gig on weekends but you're pulling in $50,000 a year from music, I would call that professional too.

It's kind of ambiguous.

Beakybird