Twin Catastrophe is a good aircraft for training on - cheap to buy, easy on the gas - but it is of limited use in the Charter world. That said, I know of at least one multi-millionaire who charters Basair/HVA's TinCans on a weekly basis.
...the other drawback with their Twin Commanches is the fact they need two pilots for IFR CHTR (no autopilot)... so not much useful load left, especially now that Edward is putting on the Kgs...