will try to explain. firstly if you add a building - it must be it's own building which exists, here it's a whole zone with a lot of buildings, so it's straight up incorrect to add just one, as it's just not there ;)

and secondly, what do you mean impractical? in Turkey and many other places if there is a resort, all the buildings are mapped separately, as it's the correct way to do so. check some resorts to the right from Antalya for example - they are all mapped quite in detail