I own a single-operator business, which means I only run one DJ system. The bigger companies are multi-operator, which means they employ DJs and run multiple systems. I prefer to run my business with one system, because I enjoy doing the jobs myself and like to control the quality of my service. I can keep my prices competitive with the larger companies, but I can only work one job a day while they can work many.
I own a single-operator business, which means I only run one DJ system most of the time. We have a second system that we sometimes use if necessary. Multi-operator companies employ disc jockeys and run multiple music systems. The bigger companies may employ over 20 disc jockeys, so the company may be working over twenty events on a Saturday night. The experience levels of the DJs may vary greatly since there is always employee turnover. Of course, the owner or manager cannot be personally involved in all the silmultaneous events, so it can be difficult to guarantee a high level of quality.