I have a suggestion for one more possible upgrade for our factory. How about a hand truck you can "research" that opens up to an hand truck. Maybe two different sizes.

A small hand truck able to move two boxes.
A big have truck able to move for boxes.

The loading and unloading of those devices could take more time than moving one single box. But even then it would be much more efficient.

That we can move boxes more efficient from the storage to the vehicle or from the vehicle to our legit business.