SECRET DISCOVERIES TRAVEL & LEISURE PT, Gading, Serpong, Telepon +62 21 22226615 There’s a lot of upside in the timeshare industry — that is, if you can make that first sale. These properties join two more of the region's favorite independent, boutique hotels—The Umstead Hotel and Spa and The Mayton, both in Cary. Heights House is among a growing number of independent and boutique-style hotels that have opened in the downtown Raleigh area in the…