The short-term rental king is a major player in a trillion-dollar market.The travel industry is a lucrative but tricky realm in which to do business. This is especially true when it comes to short-term rentals. Navigating local regulations and international expansion while satisfying thousands of hosts and even more guests are a few of the daunting challenges faced by Airbnb (ABNB -0.25%), one of the leaders in the space.Its management is working to increase its cooperation with localities and promote what ...