Low-cost airline Allegiant Travel Co. ALGT -0.21% will venture into real estate with a sprawling resort on Florida’s Gulf Coast, even as hotel development slows nationwide amid a glut of rooms. Still, investors are intrigued: Allegiant shares rose 1.5% Tuesday after the company said it will launch an all-inclusive resort company, Sunseekers Resorts. Sunseekers Resorts’s inaugural property will be a 22-acre hotel […]