We’ve come across a fabulously creative DIY rooftop tent camper build before, but this roof-mounted teardrop idea is nuts! Originally designed as a bike-towed trailer, the camper can fit onto the top of a truck or car. You’re going to have to travel solo (or really, really like your travel companion) as there’s not much room inside.
Behold: the roof-mounted teardrop trailer.
Here’s a link to the craigslist ad if you’re interested, as well as an archived copy in case the link doesn’t work.