Holiday homes for people who’d otherwise be spending thousands on staying at Soho Farmhouse etc. I don’t think they’re comparable to ordinary houses, price-wise.
I have friends with a place like this. They like it because it’s very easy, none of the admin hassle of running two houses, just turn up. Lots to do on site, lots for the kids. It wouldn’t suit me at all as I don’t want to hang out with a load of people just like me. For someone else, this would be a selling point.