They had cooks and drivers, and guards who occupied a gatehouse, armed with machetes. Seeing as I had regularly petitioned my parents for an electric fence, the business with the guards strikes me as the last word in quiet sophistication. - David Sedaris, Me Talk Pretty One Day
I have three questions about this sentence.
First, I think "Seeing as" in the sentence is working as a conjunction, but I only get the meaning vaguely. Are there other alternative conjunctions for it?
Second, the context is that the author is envying his boy friend's family ["They"] for having had servants such as cooks, drivers, and guards. My question is, what does "the business" mean here? I think it is more like "the story about the guards". Is that correct?
Third, I do not understand what "in quiet sophistication" means. I looked up the dictionary for the word "sophistication", but I think the words put together make a new meaning or something.