I don't think that the useful load of the tecnam 2006 is actually 400kg, once you have the full avionics suite on board, let alone an autopilot. It looks like an agonisingly great piece of kit, which just won't do the trick of lifting four adults, luggage and 3hours fuel plus VFR reserve fuel. Unless, of course, they are more modestly upholstered than I am.
Smarthawke know far more about this than I will ever will and can give you chapter and verse....
In the meantime, how about easing back on the throttle of what you currently fly? Suddenly, it'll become much more economical! I speak as someone who owns a 300hp IFR, complex, machine.
