he claims to be single and rich, he says he eats every meal out every day of the week. He often frequents regular chain restaurants
This part could be me, except for the "rich" thing. Also, I never attended rabbinical school. When pressed, I will claim to be Jewish as opposed to Reform Druid, but in neither case do I keep kosher, which may be the operative issue with your "Rabbi" fellow [yes, it does ring several bells. where does he say he is from?]
So I'm wondering if your original question has anything to do with his monicker. Most Orthodox keep kosher (don't get me started on the orthodoxy of those who have "reasons" why they do not), a goodly number of Conservatives keep kosher, and reformed are all over the map on the issue with some being more Glat Kosher than the Ultra-Orthodox.
Even Wikipedia has not enough room and enough contributors to even begin to give you a taste of the various issues that come into play regarding keeping kosher. My two grand-aunts had separate kitchens and dining rooms with separate dinnerware, flatware, crystal and cooking utensils for
milch and
fliesh - and they were the sanest of the family. My grandmother (their sister) cooked everything except coffee in bacon grease and she would have used it for the coffee if she could have figured out how to do it.
So - what wasa it you were asking about?
stay safe.
skidmark