Mustang and CJ1 are very nice, if he continually wants to fill the seats in the Citation II he won't be able to fly that many pax in the mustang or CJ1. The used marked is definitly a buyers choice right now. A CJ2+ (still under warranty would be the way I would go). A straight CJ2 would also be an option. There are deals to be had out there. PC12 is nice, but it is still 4.5 million for a Single-engine.