One of the ways I was able to spend $7/day on my trip was by volunteering at soup kitchens and food banks in various towns along the way in exchange for food. Not everyone has time for it but if you do you'll save a lot of money and feel great about volunteering.
Just an option!
[MENTION=291784]andrewclaus[/MENTION] - Do you know why the guy was living on his bike? Do you have any more information? PM me if you do, please! I always told myself if I lost my house I would load my bike up and live on my bike.