I wonder if he is "full time" and supports himself/his family with tree work.
He claims 20+ years doing tree work, he looked VERY uncomfortable in the tree.
I consider myself a "rank amateur" but I don't think that's a safe or proper technique for wrecking out a tree.....
I don't think the knees of someone of his "stature" would hold up to climbing for twenty years.He certainly doesn't go hungry!