Just an observation from experience:
When I was a kid we had a 13ft Hi-LO telescoping camper, the
most basic model they made. Just a dinette and a gaucho [a foam
slab couch] inside. By its function it had to have a a "dutch door".
the top door opened outward and the bottom one opened inward.
It gets to be sort of a nuisance after a while to have to operate
both of them separately. It'd be better to build a door that folds
somehow for closing up for travel that you can then fold back to the
using shape when it is set up. Having "one" door opening 'one' way
is the expected thing that we all do unconsciously.
There have been several different approaches to doing so over the
years, so it is not an insurmountable design problem. Check out the
folding hardwall designs for some ideas. Rolite - an old brand not
made any more did this, and I think Trail Manor [Technically a 'telescoping type'
camper, but their door approach is like what I'm talking about.]
[nice but expensive] has a version now.
http://trailmanor.com/wordpress/And a handfull of European caravan makers did folding hardwall sided
campers/caravans with similar designs.
Cheers,
Norm/mezmo
If you have a house - you have a hobby.