I believe you can visit any of the bigger content providers, they have contacts to follow if you want exclusive photo sets or movies shot, you can call or email them and after asking 5 or more content providers you will have an idea how much exclusive shit costs. Also, bulk orders will get you discounts.
Then do the same research about web design, as you will need your paysite designed, and
www.orchiddesigns.com does that very good, then you'll need some paysite management software (MAS for instance), affiliate management software (if you want to make money) (NATS for instance) and you will also need to research for yourself about webhosting ( you will always be spammed that on webmaster boards) all this will cost you some serious money. Then if you are new to the biz, you'll need to hire somebody to help you do all the customer support, affiliate support, etc....