I've played with multiple 'additional homes' quite a lot. Yes, you're still limited to 8 sims (unless you use a mod to override it). The game sees one of the properties as the 'home' property. However, your sims can eat, sleep, play, etc. on any of the properties they own. It's just if you use the arrow button on a sim's portrait to 'Go home' then they will go to the one property designated as home. So if you have you sims, who are living at one of the other properties, out and about and want to send them to their home (one of the additional properties), you'll need to move your camera to that property and then click on the ground and us the 'Go here' or 'Go here with...' interactions. It can be a challenge running multiple properties but if you're bored or find it too easy running a larger group of sims on one property, then you might like the challenge. Right clicking on a sims portrait is usually my fast way of swapping from one property to another fairly quickly. When you go into build mode, you'll need the camera at whichever property you want to work on. But there's no switching of the active household as they're all still in the household as far as the game is concerned, so no loosing dreams and wishes. One other thing, if you 'move' to one of your other properties that you own, ALL of your sims move there and that property becomes the main home (for the game). However, you can just separate them out again to the different properties that you're using. BTW, all mail will come to the main home as well as the newspaper delivery. I find it best to keep the property locations close together - easier to swap from place to place without having to go out to the map view. If later, you decide you no longer want to control the sims you have living at another property but want them to stay at that house, then you'll need to use the 'Real estate' interactions and sell that property first, then you can move those sims to that house in the traditional method. I hope that's all clear but I'm happy to answer any questions.