U R all discussing legal issues. Certain basic issues like how the money would be flowing in is to be crystallised and reduced to unambiguous writing in the agreement. It is always advisable to knock off the intermediaries by paying their share and enter into agreement directly with your overseas clients. There are people promising outbound campaign with stolen maillist and engage you into meaningless activity and run away with the booty. Always contact and deal with the ultimate client who is going to write your cheque directly. Also when you put up a huge set up it makes sense to fly down to the clients office and see his set up and his capabilities. International documentation has certain peculiarities . Involve a good lawyer with experience.