Go to a labor finders temp agency you will find all kinds of jobs, do anything you can to make some money. I don't know how you got yourself into this situation but there is always work out there. Maybe find something that can pay you cash that might help. Hit up any family members where ever they live you gotta have some family somewhere, ask them to fly you out there if they are far, and tell them you will pay them back.
The gym idea is good a good one but you need a little bit of cash flow to keep that going.