This young man had crippling physical health issues and became homeless before he was even an adult. He worked while homeless and lived in a camper for 12 years, I believe, while healing himself of his physical problems, then wrote a self-published book about it to help others with the same ailment. Then learned solar systems and wrote a book about that, slowly but surely saving enough money to buy a house. A real rags to "riches" story for young and old Americans. And his videos on solar are excellent for those who'd like to learn how to create a system.