Casa Lucca, Bost Custom Homes’ 7,871-square-foot lakeside estate home in Youngsville, has a large footprint. Fortunately, that footprint is green like its surrounding Hidden Lake community, developed in an ecologically sustainable manner by Crescent Communities with advice from Audubon International. During a recent visit to the stone-and-stucco Tuscan villa, builder Rex Bost pointed out several…