Admirable sentiment, but I agree with Soddim. Send the costs of the (BB)MF through the roof and watch it be culled...
Instead of buying the next limited edition Ferrari to appear, couldn't Nick Mason donate the £250K + he'd spend on that to fund the Vulcan?
Or perhaps he and Dave Gilmour (who is keen on things aeronautical, IIRC) could club together and buy the aircraft - it's not as if they'd be casting about for loose change down the back of the sofa to fund the aircraft for a year, after all...