Three years ago, Wayne Lau was a bidder in the auction of a luxury home on Hawaii’s Big Island owned by the entertainer Cher. Now he’s selling his own Hawaii property — a 10.056-square-foot custom home in the Hualalai Resort on the Big Island — in a March 18 auction conducted by Concierge Auctions, the same firm that sold Cher’s house at Hualalai Resort for $8.7 million. Lau’s 1.33-acre property, “Hale Ku Mana” or “House of Spiritual Healing,” will be sold in cooperation with…