If your keen to go dragchute and Lear 23's way then don't stuff around. Go the B744 freighter. 8 business class seats, 2 bed rooms and a kitchen. Plenty of room for all that crap charter pax like to spring on you at the last minute on the lower deck, 480kt cruise and enough range to cater for the odd charter out of Sydney to say Las Vagas. If cost is a problem then have a look at a nice lite R modal Cessna 310. Flys slightly faster and carries a touch more wieght than the Barron for the same money, 600nm with 5 pax might be just a little beyond it though.