Camperu
I am a big fan of tiny campers, I decided to make the best possible use of my 2009 Subaru Outback XT and turn it into a cross-country adventure wagon. The #camperu was born!
I am constantly tinkering with space in all of my living situations and think this constraint is one of the most fun to try to solve. In this "solution" I spent months measuring the complex interior surfaces of the Subie and designing every angle to fit perfectly in my car. We needed storage space, cooking space and for us to not get near that 1,000 lb weight limit so the design had to be very functional and minimal. It took at least 100 hours of design time and probably about 50 more of build time to make this happen, but I think it was well work the effort.
The STEP model for the build can be found over on GrabCAD