lol u are crazy if u want to start from scratch in this advanced stage of the industry. there are several cms choices designed for whatever site plan you have rattling around in your head.
if u just want a paysite u can mod the shit out of try my
Porn CMS. easy and cheap.
dont build it yourself. a huge waste of time when you should be spending your time marketing. there's no money in site building. in a year - IF YOU FINISH - you'll still have to put in hours and hours to market the "new and improved" site. better to slap it up there and market like crazy. get money flowing in, then improve incrementally.