How do you have time to clean your houses?

So I recently joined a subreddit where people (mostly Americans) share their floorplans. I cannot believe how many rooms you guys have! A foyer, a living room, a dining room, a breakfast nook, an office, hudge bedrooms, a laundry room, ... Some people even have a sitting room AND a living room or even a TV room.

How do you get time to clean all of this?!

What's the size of a house for an average middle class family? Do you all have the money to pay for a cleaning person?