I own lots of domains I got 3 forsale:
www.gr8movies.com - $10.00
www.pornthugs.com - Make offer
www.collegefiesta.com - $20.00
I am going to build a paysite design cost me around $1500.00 Front page, 3 tour pages, Join page, Members area page
Content I am just now looking into I might just go buy a camera and shoot it my self but I dont know yet!
and billing I havent looked into yet so couldent tell you.