@The-Home-ZW0
(1) create the whole house listing which you have done already
(2) create one bedroom listing
(3) duplicate the one bedroom listing created above and make appropriate changes
(4) do step 3 for other two rooms and make appropriate changes
(5) use the entire house as the parent and link individual rooms listings to the entire house listing.
If you have questions about how to link calendars of listings, do a search to find out.
I have a three bedroom house listing and three individual room listings. It works pretty well.