adaptive payments parallel payment net paypal

Looking to connect this program with PayPal's Adaptive Payment API. They call it a Parallel payment. I have organizations that want to do fundraising. Example...trial period for $20 the first month, they pay $5 each month after. My company will have 20% directly deposited into my account and 80% of the $5 a month will be directly deposited into their account. We are looking to bring on hundreds of organizations in this model so we would like to make sure that they payments are done without manually doing it or billing the organizations for our percentage. The percentages we would need to be variable...20% is not set in stone. I understand that creating a Parallel payment program is much less expensive than a chain payment program. What is the time frame and the best price that you can do this for. We have other projects in the future when our expectations are exceeded. Thank You, Curtis