Is it supposed to be a cabin with all windowed front or something?
The cabin that looks like a big display case (all glass front) and has that huge solar panel in front of it is a private cabin built by someone who is planning to live there, I think. People in my group were talking to the guy that built it, so all my info on that is second hand.
The half-finished "treehouse" cabin somewhere else on Gold is an unfinished HB project. It's basically just one elevated platform, now rotting away in the woods.