Forum Moderators: Robert Charlton & goodroi
You said he collects the data and writes about it. That writing will be semantically distinctive every day. If there's real value there, he'll have traffic and regular users. Not spam, neither to users nor to Google.
Whether it becomes an authority or just a hobby site depends on whether there are many people who care about his kind of fence.
If he's writing about the data, then ultimately he's going to get into a richer vocabulary set that might involve anything from material cost and supply chain issues to the development of new technologies.