With that mini I think it's the 50k bit that doesn't compute with me, I don't view them as much different to a VW camper that has had so much work done, 90% of the metal is more modern than my focus. In that respect I have no problems with restorations or remakes, the difference is if you have more money than sense heavily restored campers are expensive, but still in the ball park when it comes to how much motorhomes are. If they could knock them out for 20 grand they'd quickly use up all available shells (even if it was possible why bother if enough people will pay 50)
£50,000 would get you a lovely decent old mini, and whatever the best modern small car is atm as a daily if needed, along with half a dozen of Leylands far more superior cars.
The others are a matter of (lack of) taste....