Make sure you prepare a solid business plan for owning an aircraft (and you haven't got competition willing to lose value in their aircraft to get a contract).
Most of the Jandakot operators are quite happy to operate their aircraft at figures under _true_ cost (cost of money, budget for engine overhauls/repaint/instrument replacement, internals replacement, eventual aircraft replacement, unscheduled maintenance etc.). Recently I spent almost as much money on "diagnosing" a Carby problem as purchasing an overhauled unit.