I don't know if its necessary to lower your standard of living by downsizing (tiny homes). Careful planning and compromise can seriously cut down on the interior space you need. A nomadic lifestyle (van life), while unconventional today, satisfies a different set of priorities and while most people in the US would see it as a reduction in their standard of living some people actually find it liberating and exciting.

From my own point of view I would love to build a tiny house on a large plot of forested land after my children are raised and on their own (not before), perhaps with a travel van for the summers.