10-20k is unrealistic. I have been a cam girl for 6 years and I consider myself fairly hot and never made that much. I have tried many different systems as well. A hot cam girl who is also a hard worker can expect to make anywhere between 3-6k a month. Maybe more, maybe less. That number is not set in stone but it's a realistic one.
As for systems, I used to like Niteflirt but now that they don't have an affiliate program, the site doesn't receive enough traffic to get new customers. Right now I only use it when dealing with regulars.
My favorite private cam system at the moment is PrivateCamz. I don't waste any time on there! I literally get taken private as soon as I log on and it's busy until I decide to leave. That site gets quality traffic and most of the guys on there are ready to spend money.
You can sign up as a performer at
http://private.camz.com/z/index/trac...r/action/join/