Figures I have for sea level (if that is any good) are 4 crew (drivers 2, talking baggage 2) can pick up 2 fat chickens (360 lbs)and fly them around the sky for just over an hour with 20 min VFR reserves (total fuel of 750 lbs). Thats at the 7000 lb limit. EEW around 5170.
Expensive free rangers but could be a goer if marketed right.