Sort:  

Your right about the unknowns, I wouldn't want to risk my life on a prediction, not for the sake of been one of the first to walk on the red planet anyway.
I think its a clever and stupid Idea all rolled into one. like you said lets just wait and see. £6 billion is a lot to find.

Yeah, in the next 20 years I think space tourism will be a thing similar to booking flight to an exotic destination.

I'd like to book a ticket if that was the case, I think it would be a once in a life time thing to pay for but I would love to go.

Yeah, I'm afraid the first decade of such tourism the expense will be a little bit on the expensive side.