I know it's mentioned almost in passing that he got a job at a clothiers working with womens clothing which scared/terrified/offended him, but that was in his early 20's and it surely didn't pay much.
In the present day of Watchmen (1985) he seems to spend his daylight hours wandering around with his various KARAZEEE!!! whackjob signboards. His apartment is a shithole, and he doesn't seem to panhandle, so where does he get money? Does he take the wallets/jewelry of the ruffians he accosts?