One other thing, while I agree that anyone who has the cash to buy one of these can probably afford to pay to C & T, however very often these types of machine are not owned by the charter operator.
When that operator then has to fork out the hourly lease rate at 12 hours per year per pilot plus other CASA check rides, you have to be making serious money or be doing serious hours to make the aircraft pay it's way. Probably simpler and cheaper to use a 30 year old pistion twin instead.