For anyone who wanted a really collapsible solution, imagine this rooftop tent, but instead sitting it atop a basic trailer box..... lots of storage, not as scary as climbing a 6' ladder in the dark to get in and out.
It's expensive, but looks beaytifully made. (I thini it's also at the Crowdfunding stage).
Not sure I like the ladder supporting the hinge down floor extension, but if instead it was on a lower platform, little legs could be added.
Might give food for thought to someone!
The video is available for your viewing pleasure at
Ps, I'm not affiliated to this in any way, I just admire clever design