Thanks Guys, Tailwheel you seem to be right about the Conklin figures they do seem high although you need to read there section on what they include in that figure.
I have figures available already for B200 and C441, just though I would look at what else is there.
Given this mission as an example what would people recommend.
Time is money
Efficiency is key
Low initial outlay is a bonus.
750nm Sector preference for single leg, no fuel stop.
4-5 Pax @ 100KG + 10KG bag. + Pilot.
Can be anything SE Turbo prop, Piston, no restrictions.