You are describing something like "Bank uses construction loan to pay my subs" or "I got third party checks to sign over to the subs."
You treat them the Same. First, you use Receive Payment for the total, and Deposit to a Bank type of account you name Clearing or Barter.
Now pay the bills from the Barter Bank.
The remaining balance here should be your share. You use Banking menu > Transfer, to checking, for the actual Net you have, that you called your "profit." It is the Net Banking, and not really profit, of course.
Now Barter Bank or Clearing Bank should be 0 for this date; that's why it is called Clearing or Barter. It is "We avoided trading all of that banking in reality, and just traded all the Values."
Have you discussed with your own CPA if these Subcontractor costs are your revenue and expense; they might be your Work In Process Other Current Asset, instead.
