Jonty
Being an easy jet commuter I have found over the last few weeks the prices creeping up to the point that if I fill all four seats on my DR400 it becomes more economic.
The added advantage is that I don't fail to get on my aircraft as I don't overbook like Easyjet.
Retuning to the thread, the specification is unrealistic with any foreseeable technology, the Falco would be the closest to the requirement simply because it falls short no all counts by less than the others.