I've spent some time researching "full timing" in Europe. One of the things that I see there as opposed to the states is that "full timers" live 100% in their vehicles. The refer to those vehicles a "Motorhomes" and see the term "RV" as an American term. In Europe it seems that a fully contained motorhome is the vehicle of choice opposed to a converted Van or Truck where one doesn't have all the comforts and conveniences of a bricks and mortar home. (perhaps this is driven by the culture or even laws which would try to prohibit "vagabond's")
From what I've found there are two distinct groups who pursue this life style. Those over 60 and retired who may full time, and the younger set who work and travel. I've read where there are websites that post jobs
for these people who live in a vehicle where they can "Camp" for periods of time and work. (called Square Wheeler's)
A friend of mine whose family is of French origin was always talking about Eurail Passes. They had to be purchased here in the States he told me and much has changed with the offerings over the years. But as he
described it to me that there were Bath facilities where travelers could clean up and laundry service available in the stations as well. Nothing quite like this exist in the States. But where we are looking at syndicated "Gyms"
here for bathing while enroute, if public transport there offered such facilities affordably it may be a solution
as well as offering rail transit back home if there were problems with a motorhome, or you had to go back home urgently.
My father once showed me one of his Travel magazines which spoke of European young people purchasing VW Van's (set up as Camping vehicles) and touring. The article noted something referred to as Camping A, Camping B, and Camping C. A was on the move camping at a different location each night. B was manner of staying in one place for perhaps a month before moving onto another place for a month etc where those
involved in this may spend 4 to 6 months of the year away from their regular house. C was more like what we in the States refer to as "Snowbirding", which is going south for the winter and staying in one place for several months in that one place each winter. I understand that those in Europe often find a 50% discount if they stay in one campground facility or wilderness area (wild camps or what is called a rough camp in the states) for more than 3 months.
A European Travel Brochure (like this one) may provide some insights also.
http://www.statravel.com/europe-travel-guide.htm