Mark Boyle has lived in the UK since 2008 without any money (I believe he’s still doing it anyways. Haven’t heard anything to the contrary.)
He wrote two books about it, the first one, The Moneyless Man, he explains his story and the second one, The Moneyless Manifesto, he explains why he went without money and outlines some opportunities and resources for other people who wanna do the same.
Although a lot of what he does could be considered somewhat inline with the “freegan” lifestyle, he stresses the importance of indigenous skills and foraging as the only true path to a sustainable future, as well as putting in plugs for permaculture and forest gardening more specifically
He’s out there experimenting and trying shit out and I find it very inspiring.
Here’s his website.
http://www.moneylessmanifesto.org/