Logging work, confirming it, and keeping your home's history costs nothing. The only thing that costs money is the report: the printable, checkable document built from that history, when an agent or a buyer needs one.
One home, one printable report, verifiable by anyone holding it. For a buyer checking a house before the offer, or an owner putting their record on paper for a closing file or an insurance claim. No plan needed.
The record only works if every job gets logged and confirmed, so the people doing that never pay. Tradesmen build a profile no review site can fake; owners keep the proof their house earns.