I know a couple of English Timothys-known-as-Moth, both in their 20s and 30s, but I think it was just a family nickname in both cases, with no hipster or ecowarrior credentials whatsoever. (Nor any back catalogue in literary scams, fake terminal illnesses etc. That I know of, anyway...)
@CelestialCandyfloss -- I think you can see that she struggled to write TWS with no 'these two bad things that happened to us, so we did a crazy thing because we're free spirits' narrative.
So it's this weird fractured hodgepodge of 'having a minor nervous breakdown in Polruan because Moth is getting worse again', her mother's deathbed, childhood reminiscences, 'How met my cool blond ecowhatsit as he seductively dunked a Mars bar', the writing and publication of TSP, being offered the cider farm tenancy, a bit of guff about rewilding in which TW is depicted as having apparently previously run a commercial farm in the past, and the weirdly tacked-on Icelandic walk with Dave and Julie.
Landlines attempts to go back to the 'Moth is dying, so we go on a long walk to save him' formula of TSP, but despite trying very hard to continue to position the Walkers as underdogs (Moth is at death's door, SW's boots don't fit, the army is doing manoeuvres on the route, a cafe won't serve them inside, they get stuck on a waterfall), it's very obviously a tale of two fairly privileged people who are able to take an extended walking holiday, using GPS, taxis, a car collection service and hotels, buying touring bicycles, ordering replacement stoves to be delivered to a hotel ahead of them on their route etc etc.)
Probably most notable for the fact that TW is depicted as actively dying at the start, despite spending his days active and outdoors tending the cider orchards, but is magically cured by the 1000-mile walk to the point where his DAT scan is 'lit up like a Christmas tree' compared to the abnormally dark one before the walk. At the same time as TW was telling Bill Cole the doctors have told him not to make plans for after Christmas.