I'm curious what the median age is for people seeking this lifestyle. It reminds me a lot of musician-friends I've had who in their early 20s were obsessed with busking across the world.
From my data, it's mostly 25 to 35. So they leave after graduating college and presumably come back after 35 to settle. That might change though as it's only been a decade that people have been doing this (and only a few years on massive scale).