It is indeed possible to start a business with zero funding. However there are some caveats that should be avoided, and remember there is no such thing as a free lunch.
The question is, how are you paying, if it is not with money. Also starting any kind of business without knowing what your direct value add is, can be a serious problem.
Within this episode I share the third startup sin that you should avoid when starting out without money. If you commit this specific sin, and the serious relationship problems it can create for you and those around you.