Step 11: Expansion
As your factory's production needs grow, it s quite likely you will need more than 160 square feet.
To create more room for work and machinery, I've created nesting subunits. 7'x7'5' cubes made of 1.5" square tubing with 3 sides covered in fencing and 1 side having a roof fit nicely inside the container for transport; you can pack their entire volume with other gear by placing the covered sides against the walls and floor. To deploy, I bolt the cube to the outside of the container with carriage or other difficult-to-turn bolts, heads facing out and 2 bolts inside. It won't resist a determined attacker, but it does keep people from walking away with my generator or oxyacetylene tanks:)
Later, I hope to add 'specialized' containers for higher production volume and specialization: a full-container plasma CNC next to a full-container powder-coating oven, etc.