His only neighbor I can tell is Father Johannes, officially a hermit monk who moved up there with his abbot's permission to be alone. They seem to be on perfectly cordial terms as part of Johannes' deal is also video eremite stuff.
I'm not sure what is "too long" for a renovation conducted mainly by hand and alone. He works every day, as you point out, and some of the days are very long. I think he will certainly flip the property when he's finished, which is his prerogative, but he will have had the pleasure of making every inch of his own vision come true with his own hands. He interacts with the locals and hires local artisans, for example to upcycle the old timber floors of one of the huts into new windows. He is perhaps a little too absorbed in his own process -- no volunteer is allowed to film with a plastic water bottle, for example, because he thinks of the place as a movie set.
I think he can be dinged for one thing alone. The lone wolf renovator taking unacceptable risks -- Dan is wildly out of control is this department, drilling metal beams with flying sparks and shrapnel, no safety goggles. Doolard more cleverly inserts Xtreme Reno stunts quietly manhandling single-handed two ton stones, or standing on the very edge of a 3K foot precipice on a weekly basis. Dan now routinely does the same.
Still, this was always the appeal of reno blogs, vlogs, and TV shows. Doolard's is one of the best I've ever seen, if not the best. His problem-solving skills are what's on display, and he's good at it, even if hand-carved chestnut log rain gutters is not your bag.
Disturbing his "neighbors" and sticking to a house flipper's deadline, not so much.