Funny thing them "semi-permanent sheds" they sell at the DIY stores.
I remember there was a particularly windy day over here last year, we saw one of these things flying over the main highway with the "wiring" straggling behind it.

We were returning back to the fire station in a fire appliance, after a call to nail down roofing iron (corrugated steel sheets) that had lifted in the wind.

To see a whole "shed" fly across a busy highway, was nothing less than enthralling and scary at the same time.

My very loose interpretation of a shed, is a structure that is permanently affixed to a concrete slab and a bottom plate of enough strength to hold it down under all weather conditions.

It actually makes me wonder if things like this are designed to be wired, the tin foil thin walls and lack of real structural strength only serves to re-inforce my thoughts.

Just my $0.02 worth.