Becoming a full-time stock music composer is not as difficult as it might seem.
However, it all comes down to how many music tracks you have in various royalty free libraries. You will need to have both: quantity & quality!
How many tracks do you need to make a full-time income?
Unfortunately, many composers believe that it is better to sacrifice quantity in the pursue of quality. The truth though in stock music licensing is different! The more music you have out there, the better the chances of earning more.