We don't have support for something like that in CBSubs. That'd require the user to provide their full PayPal API credentials. It might be an option in the future when the PayPal gateway is redesigned with the newer PayPal API as it's currently still using legacy HTML form API, which has no support for paying out to a separate account than the one processing the payment. Note even with the newer API your PayPal account has to be a middle-man to disperse funds to their account.