There are 7 or so of these type of estates on the Oakville lakefront that change hands from time to time. Mostly new money guys who either want to impress their wives, families, friends or girlfriends....... There is a smaller version on the Burlington lakefront that underwent a multi million reno, sold 6 months later and then torn down and rebuilt, go figure.
If you want to see unbridled excess on the lakefront Google Chelster Hall, built by Hugo Powell, ex CEO of Interbrew, The numbers vary but most accurate estimate is around $50 million. Must be money in beer...