It is often said that you don’t know true happiness until you are at your lowest, and that is certainly a philosophy that American singer-songwriter Jimmy Buffett would subscribe to. From his lowest point, a time of failed musical efforts, a depleted bank balance, and suicidal thoughts, he created the euphoric anthem ‘Margaritaville’, a colossal hit that would later spawn a billion-dollar business. Initially, though, the track was rejected outri…