You'll definitely wanna set up a website with some sort of mailing list. Email people quality articles or lists relevant to this hobby on a weekly basis or so to keep them interested, and also to serve as a platform for any advertising you may do, or special deals.
Sounds like you already have a solid grasp on your field, so that's really good. If you can, get something of a reputation for it. Win a contest, or guest write an article for a blog on the subject. Take a class and get some certificate. I don't know if any of this is applicable to your situation, but you get the idea.
A good book for starter entrepreneurs is the Four Hour Workweek. The author hypes things up a bit too much, but there's a lot of really good info and lessons from experience in there.
Good luck anon. Don't give up on this, sounds like you've got something really good on your hands.