We used to have two, one in my room and one in the living room. The one in the living room is the main one so it's 4K and 50 inches. Unfortunately, I got used to that so the one in my room felt small and useless. So I ended up selling it and am currently waiting for a decent offer to get another one. So right now, just the one TV.
I have around 8, that's after leaving 2 in my house after I sold it. I have the main one that's 65 inches mounted, a 42 that's hooked up to my retro consoles (Still trying to find a retro tv for them), I have a 32 that's connected to my computer as a second monitor until I buy a new one, and a few others just chilling in our guest bedroom lol.