How would you build a large storage unit?
I have a garage that has a nice 19' by 19' space on top of it. I've considered building a storage unit on top of it, with two doors to the unit so I can split it inside down the middle and use it as two separate storage units. I've explored having an insulated carport built there that will cost about $4,000 or so. Does anyone have any other ideas that I could consider to build this, and what they might cost?