Anyway... I think this analysis is shortsighted, for a start, you can't forgo the modern civilization because you can't have a home and you can't leave it, and if you're in it, there's a cost... And it's understood that the right to have somewhere to live is essential but you can't leave the city and get to a piece of land, land is not produced anymore and it belongs to the rich, you can't buy it, you can't raise cattle or chicken and you can't plant, so, you'll die.
And then everything else comes after this. Also, lets be honest, the level of education you need to even start pondering this you can't get either, because by then you'd already have had to have eaten and lived somewhere, and maybe you have bills and you can be arrested.. Not such a viable option. Then it's also probably a big fallacy that people can really live off of welfare policy goods, I don't know how it is in the USA, but here in Brazil I'm pretty sure what you get is barely enough for you not to live like a wild animal in middle of 'modern civilization'