To make it more secure for the off season or when ever you aren’t there there aren’t any window except on the front face where the swing down door covers.
French doors would be nice since they’re mostly windows and when they are open the deck would be an extension of the living space. This 3d drawing is scale and shown at 8×12′, the person in the drawing (he comes with SketchUp) is 6′ tall.
The swing down door would be sheathed in correlated metal and operated by a ratcheting boat winch reached through a padlocked window in the back of the structure. A couple of pulleys would be needed and the lifting beam should be a 4×6″ or so. I’m not sure how the structure of the door should be made but some welded 2×2″ steel frame work would be best to keep it strong and light. The drawing shows the cable split to support both edges because that’s what Casey did but this door would be much lighter than his so if the structure is stiff enough one 5/16″ cable could take the weight.
One important safety item that may be considered is some kind of brace when the “door” is in the up position. I think a few people commented on this. Possibly some swing down braces from the sides could lock in position. So you and yours don’t get decapitated if the cable fails!
What else would make this a cool cabin design?
Here is Casey Brown’s amazing structure called “Permanent Camping”. It’s made of steel beams with copper cladding and has a rain water collection system off the roof. Transported to the remote hillside in Australia from it’s building spot in Sydney. The folding roofs provide protection from high fire danger in the bush.