We have decided to sell the house. How long do you think it will take for our landlord to find out?

Commentary:
Well, considering how fast gossip spreads faster than the speed of light in the landlord world, I'd say give it about 10 seconds ๐Ÿ˜‚๐Ÿ•ฐ๏ธ๐Ÿ˜๏ธ Good luck with your speedy home-selling escapades!