1988 dry van trailer 28’ 5th wheel. 8.5’ wide 9.5’ tall inside. Completely securable Les Schwabb was using this up to the day we brought it so I think it’s mostly highway worthy atleast to transport locally.
We’ve been using it for storage for 16 years.
Has 1/2” plywood sides with woven roving fiberglass reinforcement Aluminum roof. And heavy duty forklift bearing extruded aluminum floor. Completely water tight. Very secure.
I still need to clean it out. It also has a hanging rack that I use to remove and store my canopy/lumber rack.
This could be your storage shed for your new tiny house that I have for sale too. See photo.