I forgot about the month i spent living in a converted container one on the deck of the attwood hunter.
That was horrendous for condensation youd wake up i. The morning with wet quilt and all your clothes were soaked it was literally running off the roof. Didnt help that they had ac units on the inside of them.
How did they get away with that? Accommodation modules are normally Type Approved and A60 fire rated on any proper vessel/rig/barge.
I have used converted containers for various control rooms and offices, in a variety of climates and never had a problem with condensation.
Surely the a/c can only reduce condensation?
The best one was a 20′ insulated/reefer box. Spot on.
They are also way more secure than a wooden shed or up and over garage door. It also easy to fit a locking bar or similar.
Remember, a lock will only keep an honest man out.