Personally, I love caravanning, and could easily live in one. Living on waterways I imagine would be similar ,with respect to the community one would engage with and hopefully never lonely. Loneliness and water don't mix for very long do they ?
Valvalid gave a really good over all reply to my questions, and is obviously happy with his lifestyle. The website link from TheComeBackKid is brilliant.
So many good points and ideas given, which obviously come into the equation, my confusion at the moment, is the cost of the vessels. They vary so much in age, cost, length , and there doesn't seem to be a general rule of thumb . Some are around 100 years old and selling for similar prices to those more recent models. Condition obviously has to be a huge factor, but I find it remarkable, that they will last so long if cared for, where as a caravan would be pushing 30 yrs max.
Needless to say, there are some regular costs involved at times. Blacking is relatively cheap, to what I expected but the following link gives an idea of what cost could become, including engine maintenance etc.
Yoller, your idea is good, as there is masses of time to think on this and (unless I drop dead) more informed decisions could be achieved from practical experience.
Great ! I'm getting really excited. http://aquanarrowboats.co.uk/marine-repairs-centre