It&#x27;s also common to overlook that just because there is a house already bought, doesn&#x27;t mean people can live in perpetually without someone having to spend money. Houses require constant maintenance. Floors won&#x27;t clean themselves, plumbing won&#x27;t fix itself when it breaks, etc. Even if people had alternative food and water sources, you can&#x27;t house them in comfortable conditions without expending money on maintaining those conditions.