Marketplace site video store with cms for adults

Hello,
I have a project to do a marketplace with some video store to be paid online, with 3 back office and 1 front office completely available for customers, vendors and the admin. The site will be for adults sexy media videos ans pics to be buy from the customers and sells from the vendors that they could put them own price.
Also there will be a part for customs videos. Could come back to me so i can explain the all process. Thank you.