While FIRST will never allow it, it can be fun to dream...
This thing is called a Tower Blind and hunters use it to blend in with surroundings and get some nice pre-fab shelter from which to pick helpless animals off with. Tower Blinds are made to be quite portable and are usually pretty small, (I'd say roughly within that 10*10ish area) so that they are easily transported to hunting sites. I haven't done a whole lot of research but I think they run upwards of $800 to $4,000.
Practically this is about the easiest way to actually get your idea safely into a pit... Oh, and I think scouting should get dibs on that second floor...