Membership functionality needed for existing script

Hello, We need to integrate / add a membership module to our current script . we think its better if you use a opens source membership script so that we can get this done cheaper. The membership script must be able to integrate with payment processors like paypal , the others can be added later on if required. here is our current script demo [login to view URL] admin panel demo: [login to view URL] user and password: admin Admins must be able to view / delete / change users profiles , they should also be able to specify which channels can be viewed by which user groups. subscriptions for paid channels should be available and automated. Also options to remove ads for certain user groups must be available. No using others scripts or ripping off unuthorised scripts. MAx budget: 100$-150$ lower bids have higher probability of winning. Also if you do this well we will consider hiring you as full time developer for our company.