At various times I have shared houses, worked off my rent at gardening or handyman work, rented a whole house and then sublet rooms to live almost free, lived in tiny spaces, lived in a car, and lived at work. Eventually, I bought a house for $15k in an area with a declining population due to farm amalgamations. Maybe you can find a place for a "tiny house" and get one, or just a travel trailer to start. If you can start an internet-based business, it really opens up your living options. My friend Steve relies on many "nickel generators" such as instructions he has written that sell a few a month, and free-lance writing jobs. There are also various caretaker jobs, from house sitting to industrial security, which mostly involve living on a site. Some people buy and sell used things, from garage sale items that might need a touch of cleaning or repair, to whole cars, etc. The biggest skill is knowing where things are cheap to buy, and where they sell at higher prices. Usually, this involves having more time and space available.
You can also save vast sums by using a bicycle for all your basic transportation. Some places are not suitable, but some are, and you can only tell by riding once you are proficient. if you find your home, work, and shops by bike, they will remain within comfortable range.
The art of independent living has as much to do with economizing as earning.