how many of you guys play music for a living and its your only job or only source of cash. Either solo or in a band?
Me, sort of. But we haven't really got to gigging yet, however we got some solid offers (1000 eur per 45 mins from various places). We'll start gigging there once we feel we're ready.
I plan on it, Like once me and my friend get a little older and get more money and band members we're gonna try to get hella shows and Myspace our band like crazy.
I did before, but not at the moment (summer break, all my bandmates have gone back home).

I wouldn't advise it for rock music at all, it just won't work, no consistency. Jazz on the other hand, with a few pop-ish gigs on the side gives you more than enough.