It's interesting, but as he says, it was based on one kind of search, 6 persons in one area. It's a correlation within the search results, he can't know if any of the points is causal.
He saw a lower price per bed as favourable, but that could be typical for the search for a bigger family, which may have less money to spend then a couple.
I saw no mentioning either of operating system and browser - results vary by that, not only on airbnb. If he did only one kind of search, on one omputer, probably a windows desktop or laptop, as he transferred the results into Excel, the price factor is not significatif. You might get other results on a high end smartphone.
But a very nice find, @David-and-Fiona0 !