A palatial waterfront estate on Key Biscayne is hitting the market at $29.5 million, and it comes with serious boating credentials. Set on a 32,300-square-foot lot, the property delivers 346 feet of water frontage with direct ocean access — a prime setup for the yacht set. The seller is Raúl Rocha Cantú, Mexican businessman, philanthropist, and co-owner of Miss Universe. Behind gates and lush...