The Black Simmer

Hi, I'm new to The Sims 4, haven't been playing for over ten years, so almost everything is new to me. One of my favorite things to do in The Sims has always been taking photos of my sims doing stuff, though so I've been looking around at all the amazing screenshots people take of their sims. I think I know almost everything I need to get started, but I see lots of people taking couple poses with a lot of people in the background. Are these taken on generic lots, or do they move into the lot just for photos and invite a bunch of people so they can hang around in the background? I don't think they use decor people, it doesn't look like it.
Sooo my question is basically: how to use the teleporter out of your home lot? I read on a Sims 3 forum that they place the statues in build mode before having their sims visit. Is there no easier way out of it? Is there a cheat or something so I can use build mode when my sims are on the generic lot? I'm thinking about vacations and stuff too, I so badly wanna do some group poses when they're on a getaway. Sorry for this totally too long post, and hopefully my english isn't too bad! thanks!

Thank you!!!