When Elon Musk was 17, he lived off a dollar a day for a month to see if he had what it takes to be an entrepreneur. He explained the experiment to astrophysicist Neil deGrasse Tyson in an episode of Tyson’s StarTalk Radio podcast:
“In America it’s pretty easy to keep yourself alive. So my threshold for existing was pretty low. I figured I could be in some dingy apartment with my computer and be okay, and not starve.
In fact, when I first came to North America — I was in Canada when I was 17 — and just to sort of see what it takes to live, I tried to live on $1 a day, which I was able to do. You sort of just buy food in bulk at the supermarket … I was like, “Oh, okay. If I can live for a dollar a day — at least from a food-cost standpoint — it’s pretty easy to earn $30 in a month, so I’ll probably be okay.”