I Too Have Wondered About This
I wish there was no so many sarcastic comments on this sight. I have wondered this too and I am glad you have asked.
I suppose you would probably want to have say 75-100 hours or so built up before you take on a trip like this. I think it would probably be best to do something like this with maybe 3 other pilots in a 4 seater.
Does anyone know (or even IrishJason, if you have your licence at this stage), if any groups organise trips like this where everyone pitches in a few quid to fund the trip.