An agency's website with its owners' homes
An agency's website can show its owners' homes, each with its real availability, once the owner allows it from the home's listing.
The owner allows it
The home and its listing are the owner's. In their own website editor (Web › Homes › the home), "Agencies that can publish and edit this listing" lists the agencies they work with: ticking one lets that agency show the home on its website, with its availability and prices, and edit the listing.
Unticking it takes the home off the agency's website straight away. The owner can still publish the same home on their own website.
What the agency sees
In the agency's Web › Homes, the owners' homes appear next to its own. One the owner has not allowed yet shows "No permission from the owner" and is not published. Once allowed, the agency can write or improve its listing; both edit the same listing, and the owner's Keyio data (capacity, times, registration number) is used as it is.
Requests for an owner's home reach the agency, since they are sent from its website.