I haven't done it personally, but I don't think it'd be too hard and I know people who have done it under similar circumstances.
You can probably find work at Miguel's or the Rockhouse, depending on your kitchen skillz (heh, heh). Living out of your car or a tent at Miguel's is 2$/night (60$/month). There are also some local adventure related businesses (ziplining, thrillsville, etc) that might hire you.
You'd be able to climb whenever you weren't working.