The main thing I need to know is how much it would cost to buy it and/or what price they would set.
For comparison, a working 156 is currently up for auction for £50k starting bid with 18% fees attached on final auction price. If/when ERS decide to sell their unit it will probably be for around scrap value, though obviously you would have to offer higher than a scrapyard would. I would hazard a
very rough guess at maybe £50k for the 4 vehicles, but then you might be looking at transport costs of maybe £10k per vehicle. Essentially I doubt you'd get much change from £100k.
Then of course you need to factor in the cost of land, building suitable infrastructure to hold the coaches, planning permission and then converting a vehicle that was never designed as a living space into a home. Costs would obviously be lower if you only had one or two vehicles but then you consequently have less space to work with. Sorting out corrosion on a unit that's been stored in the open for 12-17 years will also be a big cost - and an ongoing one as that rust won't just go away for ever.
Don't forget that for a project like this you are highly unlikely to be offered a mortgage so you will need deep pockets and plenty of savings.
But this forgets the obvious issue that 2040 is a long way into the future. Even if you can stump up the funding ERS will want to dispose of the asset at a time that suits them. In short, a nice idea but the only way this will ever happen is if you build up a massive amount of capital and are able to access it all immediately when a suitable unit comes on the market.
