I actually know a guy that makes a pretty good living by jerking off on a cam for his gay site. He is 100% straight and pulls some really hot women but he does that on the side and makes pretty good money. He drives a new Porsche Boxster and lives in a decent house.
I'm not gay so I wouldn't know but I would assume that you wouldn't have to get fucked by guys to have a successful site. If a solo girl can have a site where she just plays with herself then why can't a guy? If you are a handsome man and well endowed then why not.
Where are you located? I am looking to hire someone but nudity is not involved.