mtgl, I think my Spanish is pretty good, for a non-native speaker. I lived for several years in a Spanish-speaking country where, by the way, a lot of business, food-related and other, was conducted in cash, without receipts and licenses and, oh, by the way, paying taxes on the income received. (Just in case anyone wants to look inside that can of worms... in an overcontrolled country such as Chile, some businesses avoiding paying taxes means other businesses get scrutinized that much more ... in an undercontrolled country such as Argentina, practically every business and individual trying to figure out how to avoid paying taxes contributes to economic collapse. Here in the USofA, when you see someone asking to be paid in cash and you suspect they're not going to be reporting the income, what do you, but grind your teeth?)
But I don't believe it's my place to be talking people who like to cook in their yard or garage into opening restaurants if they have their own reasons for not wanting to do so.
I think there's something to Kennyz's point that this is essentially a private backyard event (albeit one where attendees feel a compulsion to give the homeowner some cash to share his food costs with him), rather than the typical Eating Out in Chicagoland restaurant thread.
We've had some threads in the past about private, "underground" dinners ... just thinking out loud, are those a good analogy? The concept is a discussion topic in itself; the food is harder to talk about since very few of us ever have the chance to experience it.
"Your swimming suit matches your eyes, you hold your nose before diving, loving you has made me bananas!"