Engine - Turbo diesel capable of running on Jet A1 (or DERV or Red). Make it possible to stick skis or golf clubs in the back. Sod the C of G calculations - make it so that if the nosewheel is on the ground with doors shut its OK. Moveable rudder pedals for dwarfs. Stick wacking great strobes on it. As low stall speed as possible (auto LE slats?). 120 kts cruise. High wing to keep the sun out.
PM