What have you done to fill those seven days off BESIDES instructing? Ferry? Contract? Offered to cover vacations/sick calls at other companies? Babysit guys who want a somebody in the right seat to keep an eye on them?

Or, if your boss is game and you are really gutsy, buy a 310, put it on the boss' 135 ticket, and do hot shot cargo. If you bring the plane, assume the costs, and give him a cut, he might go for it.