Very well said IamMadMan.
I preach this same mantra on a regular basis to those who ask about "doing a cook for a friend". Even if you perform the task for free you could still be held liable if something goes wrong. It all boils down to how much legal exposure and financial risk an individual is willing to take.
If you are prepared to risk it ALL then go ahead. Otherwise do the necessary due diligence to cover yourself. You are talking about "doing business" which is a totally different thing than cooking great Q for your family in your back yard.
If you want to go into business then take the appropriate steps. If not the be prepared to accept all possible consequences.
It only takes once......do ya feel lucky????
Do I smell SMOKE?????