As you start regularly putting out content, you’ll hopefully start to build a bit of an audience. But to start seeing real money from YouTube you need to market your videos elsewhere. Share your channel on Twitter and Facebook. Distribute videos anywhere else you can think of. Also, interact with comments and build a community around the videos you’re making so people will share it with their friends.
Go hunting or foraging for food. You may need to invest in gear and permits, but if you already have these, this is an inexpensive way to get your own food. If you're ethically against the killing of animals, it's pretty easy to forage for food, depending on where you live. Just make sure to forage only for food whose origin and properties you are sure of. Getting sick or poisoned is never any fun.
The other wants to make money because it allows them to make more things. They want to improve their products. They want to extend their lines. They want to create another book, another song, another movie. They love what they make and they see making money as a way to do even more of what they love. They dream of building a company that makes the best things possible... and making money is the way to fuel that dream and build that company they love.