Business Week – With $23 billion in debt, the most of any U.S. hotel or casino company, Caesars Entertainment (CZR) wants to expand its business in Las Vegas without dropping a bundle or adding to the glut of rooms in the city. So the owner of eight properties on the storied Strip, including Caesars Palace and the Planet Hollywood casino resort, is placing its limited expansion budget on an unlikely bet: a 550-foot Ferris wheel. The High Roller, set to make its debut in 2014, and the surrounding Linq “party district,” opening in stages starting in December, represent Las Vegas’s latest…