Recreate strongholds from LOTR and such

I'm saddened that no billionaires have tried to build for real some of the gorgeous strongholds and castles from LOTR or Game of Thrones or similar. Of course such a project would easily require a few hundred million dollars to start but they spend more money on many more ridiculous things. Most structures these days are steel and glass and wouldn't survive a thousand years. They have the imagination but nobody builds beautiful fortresses like they could. I totally would do this if I had a few billion.