Kelcy Warren knows pipe. He grew up welding with his dad for a modest pipeline company in East Texas and later found he had a knack for buying up undervalued pipeline outfits and squeezing money out of them. Along with Ray Davis (future co-owner of the Texas Rangers), he built Energy Transfer Partners into one of the nation’s largest pipeline companies, making himself a billionaire along the way. He recently caused a splash in Dallas by giving a reported $10 million to downtown’s new Klyde Warren Park—named after his ten-year-old son—but what he really wants to do is sing. He owns a recording studio in Austin, and in his $29 million, 27,200-square-foot castle in Preston Hollow, there is a hidden door in a walk-in closet that leads to a secret room filled with guitars.