I'll offer $75,000 for the whole thing. Problem solved.
While I'm all in favor of preserving historic buildings, it appears to me that this one can't pay its way. The current owners borrowed to buy it, and now can't make the payments. What is the lender supposed to do, say, "OK. Never mind. We'll just forgive the loan..."?
It's not going to be torn down if it's sold, apparently. It will become something...maybe even something profitable that will allow it to continue to be open to the public, perhaps as a restaurant, a luxury hotel, or whatever.
If it's important enough to enough people, they'll raise the money they need. If it's not, then it will be foreclosed on and sold. I see no alternative to this.
Not the most prepossessing of buildings.