You need time, effort, and creativity to build anything worthwhile.
I intend to build a tiny teardrop trailer sometime this summer. These tiny camping trailers are built on a commercially built trailer frame, on top of which a plywood structure is mounted.
I could build this from scratch, just using half-inch sheets of 8′ X 4′ plywood I cut to shape for myself, or I could buy a kit ~ and I think I’m going to buy a kit.
Some of the available kits include:
Make: features 11 Teardrop Trailer Builds on its blog.
Including this, which I really like because of its squared-off shape, which will give more usable space than a ‘classic’ teardrop shape.
This is totally home built from scratch on a commercially bought steel trailer frame.
This teardrop camper kit is from Fyne Boat Kits, and I really like its sculptural, upturned, boat-shaped design.
So-Cal Teardrops has a range of kits, including this off-roader.
And, Little Guy Trailers has this 5 foot wide teardrop kit.
Or, I could also build just from plans, like the Wyoming Woody.