It's the only thing I earn from at the moment, and has been for a while already. Though mostly my money comes from jobless benefits currently, formerly it was student benefits; thus I answered partly. Gotta love living in a welfare state! That being said, I'm searching for a part-time job or a place to intern at though, the benefits get cut from gig payments and as the latter gets paid whenever, it's an annoying hassle. And with just the benefits I don't get enough money to eat, it just barely covers my rent and internet bills.
I don't just record and mix though, I also do FOH and play guitar and all kinds of stuff, anything that pays. I don't really even intend to be doing just recording and mixing in the future either, my interests are more diverse. The coolest thing I can imagine at the moment would be to get employed by a small video game company, to twiddle with vo recording, music and sound design.