Facebook is the de facto social networking site today, but you shouldn't forget about the rest of the sites, since their services are used by quite a lot of people as well. They are somewhat different from Facebook, so there are a few guidelines to consider when using them.
Unless you are going for the ultimate and most expensive smart home setup, you don't need to spend all your monthly income on buying lots of components, sensors, smart bulbs, security cameras, etc., since for most users, it would be overkill anyway.