Maybe as a user I can help answer this. Multisite are indpendent sites, thery’re just connected in the back-end so you won’t have to log in and out all the time to maintain different sites. Multisite with 3+ sites is very resourceful because of the java used for Wpresidence, won’t work. But it’s also not needed. Check demo for ‘properties per city’ pages, you can use those as country pages. You also then benefit from Advanced Search.