How big is 320 square feet? It's roughly the size of a school bus. And Debra and Gary live in that amount of space with their teenage son. Why? Well, for starters, because it cost them $15,000 to build and now they're mortgage-free. They pay less than $150 a month to rent the land, which supports both their tiny house and their tiny workspace. And that's not even getting into how little they must pay for utilities. A tiny house means fewer emissions and less waste, but for this family it also makes damn good financial sense.

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They don't feel cramped, either. Debra says the house can sleep "probably six people comfortably, eight to 10 people uncomfortably." Their kid even has sleepover parties in his tiny mouse-hole loft. In the video above Debra shows how they manage to pack in full-size appliances, guest space, the kid's bedroom, a study, and a pantry into a Borrower-sized home.

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