People hauling....go 206. Underslung work....go 500.
206's go hundred hour to hundred hour without problems usually....500's can be more labor intensive especially if trying to blade track the rascals.
500's burn more fuel per hour....but do go like a rocket compared to the Jet Ranger....one can die of boredom going any distance in the Ranger.
I never had back problems in the 500....the 206 destroyed mine!