Do you have the patience to wait out a 6 week period of negotiation that might result in another candidate taking the job full time? If so, then offer terms to

Do you have the patience to wait out a 6 week period of negotiation that might result in another candidate taking the job full time? If so, then offer terms to 5 companies simultaneously and take the first two that execute agreements. If that's going well, offer a few hours a week of engineering analysis and code review in return for right of first refusal on your original terms to one of the remaining three.