It's an interesting idea but not something I personally would want to be involved in unless I was confident in advance that the money could be raised.

It has to be borne in mind the land has little value other than what has been created out of the ether by nothing more than two sets of councillors raising their hands and the site's statutory guardians sitting on theirs.

Without those hand movements the land could be bought for peanuts. Is the public going to be willing to fork out hundreds of thousands of pounds once they understand that? I rather doubt it.