Oz’s multifarious endeavors have certainly made him rich. Beyond whatever money he and Roizen earned for the first five “You” books, they received a $7 million advance from the Free Press for the subsequent three, according to Crain’s New York Business. A television-industry expert told me that the bare minimum he is making for the first year of “Dr. Oz” is $3 million, which would rise significantly within a few years. Oz doesn’t dispute those figures. But he was plenty affluent without all his current media activities. He purchased his home in Cliffside Park — a sprawling manse — about a decade ago, and well before “Dr. Oz,” he plunked down $2.5 million to annex the lot beside it.