popularity. there's a documentary on netflix. "tiny," a story about living small. with her 84-square-foot home, dee williams' tiny home has helped her tap into one of life's biggest secrets. >> a lot of people are discovering that what they have is really what they need. and they are finding that they are a lot happier once they let go of the myth that you have to have something more in order to be happy. >> reporter: for "nightline," i'm juju chang in new york. >> i buy that. you don't really need a big house that people dream about. >> i guess not. but some people do have some genuine need if you have kids, family. that works for some folks. and that trend has been growing. i don't know how they do it. >> i always believe you have made it in america when you have enough room for a freezer. for costco. downstairs. yes. to store all the leftovers.