The finest castle in… Austin?

Hard to believe they could find anyone to rent this place for $350 a night. But they apparently do, according to the piece in today’s issue of the daily. New Yorkers, mostly, I imagine. Who else? I was struck by the article and these photos on the rental site because I used to own a condo within spitting distance of the "castle." That was back when Austin was small and cheap. Long gone. What I’d like to know is how they keep the black mildew off the stone? It’s a never-ending battle with the stone work at the rancho.