After a fruitful stay in Paris, Copland returned to America optimistic and enthusiastic about the future, determined to make his way as a full-time composer. He rented a studio apartment on New York City's Upper West Side in the Empire Hotel, close to Carnegie Hall and other musical venues and publishers. He remained in that area for the next thirty years, later moving to Westchester County, New York. Copland lived frugally and survived financially with help from two $2,500 Guggenheim Fellowships in 1925 and 1926 (each of the two ). Lecture-recitals, awards, appointments, and small commissions, plus some teaching, writing, and personal loans kept him afloat in the subsequent years through World War II. Also important, especially during the Depression, were wealthy patrons who underwrote performances, helped pay for publication of works and promoted musical events and composers. Among those mentors was Serge Koussevitzky, the music director of the Boston Symphony Orchestra and known as a champion of "new music". Koussevitsky would prove to be very influential in Copland's life, and was perhaps the second most important figure in his career after Boulanger. Beginning with the Symphony for Organ and Orchestra (1924), Koussevitzky would perform more of Copland's music than that of any the composer's contemporaries, at a time when other conductors were programming only a few of Copland's works.