So here is the deal: I am looking to put some storage units at a rental property I have. Due to zoning/building codes I can't economically build a building, but I can put a shipping container on the lot and use that for whatever I see fit. I want to convert a 40' box into either 4 or 5 storage units with individual access. A company here in town says the will do it for $1200….per door! That seems insane to me. Does anyone know of any resources to help with this project? All I am looking to do is to cut holes and install access doors (either roll up or hinged) in the side of the container.