I have composed a Special piece of Music; but no money to produce it. How can I raise $500,000 to produce it?

You can produce it at a local recording studio, no need to spend big bucks.....make a 100 cds, put it out to all the radio stations, contact agents, local band shows on the radio and send it to major labels. A lot of recording artsists help up and coming ones too so you should contact them via their websites. If its good enogh the agents or record producers will contact you.