true they are not very common, i fly for a VFR only single engine 135 outfit. we get a handful of charters but not a ton. kind of hit or miss. we fly 2 172s and a 182. our main business is flight training and rentals, fire watch in the summer. its kind a random range of customers for charters from lawyers who need to give a quick deposition half way across the state or some golfers over to the coast for the weekend.... random stuff.