Reply to Question about genres

I'm a music producer/audio engineer...and I've been interested in taking up DJing for a while, it seems incredibly fun and also seems like a good way to put my massive music library/obsession with music to good use.

The thing is, I'm not really interested in DJing most types of club music. The genres I'd be most interested in would be

1) Downtempo/Trip Hop
2) Hip Hop (mostly underground)
3) Reggae/Dub

I'd also be possibly interested in DJing Minimal Techno and Breakbeats.

I definitely want to give DJing a go, but I guess what I'm wondering is...if I want to make some money off it some day, how much of a market is there for those 5 genres in 2012?