Why only 3? Couldn't you do a layout like this?....Okay I figured how the pawn shop works. After the 1 day + several hours 1 contract gives 2 extra collectible items. The more pawn shops built, the more contracts can be opened. I'm not sure if buying multiple contracts in one, turns the other buildings/pawn shops on to collect extra items as well. I need to place it so I can get 3 of the adventure buildings at once. Its only a 1X1 so the most you can get it near is 3.
By the way this pawn shop does not work on space related collectibles.