Customizable mine carts and boats and Horse carriages

Furnace powered carts and boats that can be built on a frame you craft. You can customize them and build on them, with a block number limit. Coal or wood powers them. A carriage in which you craft the frame and can build on it, but only enough that horse can pull it. Imagine how many more people will be drawn to this game if you announce this. The replay value would be huge! If you see this, just imagine what this could accomplish further for your game. Just consider it.