Peter Volny has always been “car crazy.” The founder of Concours in the Hills says he used to doodle racecars in his textbooks as a student in his native Australia. After a brief stint as a racecar driver, he built a thriving advertising business around promoting the automobile industry.  “I’ve just loved cars my entire life and I’ve had a variety of fast cars, sports cars and exotics,” he says. “I’ve just always been passionate...