It would be important and correct to make the theme functional to allow the functionality mentioned by Branko Danilov, I and other agencies look for themes that do just that as well as the best reservation managers do it (Booking, AirBNB etc...), When you manage properties of a certain value and with a good number of beds you need to set a minimum price up to a certain number of people and then be able to add an extra price if that number of people is exceeded

Example: price of 300 per night for the 12-bed property if you are from 1 to 6 people and add an extra guest price for each person added from 7 onwards. Only in this way can the theme be used to replace booking management such as Booking.com or airbnb