I've met a few people living in vans/converted trucks when I've been in France. There's quite a few countries around with great regulations that let you park up in lots of places, e.g. in France there are regular places you can stay along the major roads for free, usually with decent facilities. I met a girl there this year who had converted a truck into a mobile home. It even had window boxes for her plants!

Unfortunately it's much more awkward in the UK. So much of this country is private land and everyone's so afraid of gypsies that you're basically prevented from setting up a van nearly anywhere.

I work remotely and I've started experiencing leg problems from sitting too much. So I'm now trying to set the trend of "wood-working"; where I go for a walk to the woods nearby, sit on a rock by the river, and do some coding. It might catch on ;)