"A long time ago in a galaxy far, far away...." I lived for about five years in what used to be called a "pickup truck with a camper on the back". The rent was so inexpensive that it was zero. The few parties that I hosted there turned out well due to the intimacy engendered. I lived very close to the beach , so the view was fantastic, and, due to the ideal climate, I did not require a heater like the people in the video. Those were the days before claustrophobia reared its ugly head. en.wikipedia.org/wiki/Travels_with_Charley
I am not sure the U-Haul Box Truck is a realistic option for me.
However, if I win the lottery the travel company you linked would be a no-brainer for me.
A few years back I actually did a poor man's version of such a trip. After having carefully investigated the logistics of a very long distance walking trip I decided it would not work for me. Instead, I did the actual distance by walking around my neighborhood over a period of months and kept precise records of distance, time etc and matched it against actual locations. Family and friends suggested that the financial savings from this approach might well be invested in working with a therapist.
There are many trips I would like to take but probably will not get to do except perhaps virtually.
I'm afraid the best of my journeying days are behind me, but this place might provide some adventure. "I have the vague suspicion that both Joyce and Hegel simply authored their works and never actually read them." They were probably afraid to.