> It takes place in a near-future where solar and hydrogen energy are robust and cost effective enough (...) As of now, each bit of solar/hydrogen/etc. energy

> It takes place in a near-future where solar and hydrogen energy are robust and cost effective enough (...) As of now, each bit of solar/hydrogen/etc. energy technology requires raw materials mined from around the globe, processed in factories around the world, and assembled in some other corner of the world: the number of people that made it possible could easily add up to millions. And these people are doing it to make money: there's no incentive to make the technology suitable for someone who's planning to get lost in a forest and stop paying. In short, I don't think these technology will allow you to "walk away" any more than an iPhone can.