I can't seem to find the Ferrets' lodge anywhere... where is it? Is it in the Ferret village or on the map?
The ferrets' (builders) lodge is indeed one of the buildings in the ferret village. When you enter the village, walk to the northwestern archway but don't go through the archway. Instead walk counter-clockwise around the outside of the group of buildings. The door to the lodge is a quarter way around.