The physical building will likely never happen. Time to think about a "virtual" museum.

One of the problems with an actual physical museum is that it is accessible only locally. Virtual museums are open to EVERYONE!

Have it set-up like an actual museum, with a floorplan layout that takes you through the history of gaming.

First floor: Ancient through Illegals
Second Floor: "Modern History" with legalized Nevada, AC, Reservation/Riverboats
Third Floor: International

The floors would have individual "rooms" that would be a separate subject with displays, writeups, videos. Make it so large that you have to keep coming back - again and again.

The club could have THE site and be THE authority when it comes to gambling history/resources. It would take years (decades) to complete, and always be updating. To do it right, it will take alot of money, maybe ALL the MoGH money to develop (or more). But in the end, you could have something special.