If free soloing (using only rock shoes, without the protection of a rope) is the purest form of climbing, then aid soloing is the slowest, most cumbersome kind one can imagine, mixing, as it does, terror and tedium.
There are grab bars on the front steps that he used to hoist himself into his home, an elevator with a rope pulley that he operated himself, and he fashioned his own form of physical therapy in the long driveway, challenging himself to crutch down to the road and back.