Im sorry that your still considering doing this gig for this fellow.
Let me just say one thing here. I always figure that my time for doing a gig is.........$15.00 dollars an hour. This includes ordering the food, fetching the food, prepping, cooking and ect.
You really need to look at your expenses and cover your own backside.
Im sure this lowballer doesnt work for free, therefore why should you.
If your trying to get your name out to the public, this fellow isnt your goodwill ambassidor sp?.
I would tell him that your unavailable that day, due to another commitment that has come in. Thats all you have to say.
Good luck with your decision on this one but I dont volunteer cook for any strangers for sure. Brethren bash...........notta problem......or for family members or great friends.
One more question for you? Do you have caterers insurance?
Not trying to embarrass you, but this dude sounds to me like the type of person to claim food poisioning and really sink your ship.
Just thinking out loud here, dealt with thest kind of folks before. They love to lowball you, then scream some type of chit to really kick you in the groin.
I told them I was unavailable, and to please find someone else to cook there gig.
I never regretted doing what I did.