What museum will pay that kind of money for a 1:1 model with a few original pieces included? Is there really a market for this kind of thing?
Most museums I know of are cash strapped to put it politely and are not going to be able to make that kind of investment, even for the real thing.
Years ago a particularly irritating British TV presenter parked an E E Lightning in his front garden. It wasn't his, it was owned by a company who were planning to put it on static display close to DERA (Defence Evaluation and Research Agency) at Farnborough. The local council wouldn't allow it, hazard to motorists and all that. I think it has since been scrapped, but I bet it didn't cost as much as the Me 262 replica.
Cheers
Steve