Heh well if it would go as far that I'd be a billionaire and could really afford to have big and crazy dreams, I'd hire an exposition hall and put it full with playmobil, all purchased and set up by me.
I'd set up a huge medieval diorama with multible small cities with a castle, for the different factions and include a forest, bridges and rivers, harbours and everything in it. Kind of a small kingdom.
Aside from that I'd also do something similar with a western diorama.. making an enviroment with cliffs, canyons, rivers and all that, with indian villages, a town, a train going all around it, a gold miners camp and both a northern and southern fort.
For pirates I'd make a wealthy port town guarded by soldiers, a small island group with some pirate hide outs and treasure islands, and quite a few ships.
And then I'd also get into romans and egyptians, for their own diorama.. Probably with a roman island and a part of an egyptian desert seperated by sea.
And best of all, I'd pay people to keep it dust free.
