The tiny homes craze has moved into the RV community with something called micro camping, and, in particular a lightweight bicycle camper than can be built for $150.
Paul Elkins is the inventor and he is quite the tinkerer and an expert small boat and shelter builder. He also shares his numerous inventions and his plans and has a huge following in the DIY community. The detailed bicycle camper plans are available for download for $20.
Or you can watch this video on the project, which shows step by step how he did it.