To add Holiday Rental Listings to the website, there are two things that need to be done.
First, ensure that the property has been set as Holiday Rental - Yes.
Next, ensure that you have created a Child Menu (Holiday Rentals) and it is linked to the web address
/pages/real-estate/results?listing_sale_method=holiday&display_sale_method=RENT
Once these two steps have been done, you should be all good to go.