Having started in the days when there weren't any mobile DJs per say, the business began as a service offering based on what bands could and could not do, e.g. 20 minute versions of Proud Mary featuring a solo of every member, 20 minutes on - 30 minutes off, no organization, having to feed 5 band members and 5 girlfriends, and a certain arrogance that defies description, perhaps closely related to the "only game in town" syndrome. Mobile DJs were relegated to soc hops, lower end beer blasts, and clubs.
Having started in the clubs, $50/night, 10pm to 3:30am, for almost 4 years, slowly, the outside events began. Holiday Parties first, Anniversary and Birthdays, and then the golden egg; Weddings.
My heros in mobile DJ work have always been those who made it a successful business. John Roz, Bernie Howard, Johnny Dee and others who are the pioneers that have forced the industry to grow by needing bigger, better, faster, and more efficient everything; contracts, equipment, music, you name it. However in regards to mentors, I've unfortunately had to learn everything on my own and for that it is hoped that anyone who wishes a career in MDJ world keenly deciphers the loads of information being freely shared for those rare diamonds that will provide the next step to the next level ithout having to learn the "hard way".
I remain successful today by finding and befriending those business men and women who also continue to remain successful throughout every stage of industry growth, the good and not so good natural evolution.
Liken it if you will to a golf game. Play only with 20 handicappers and there is where you'll probably remain. Play with scratch golfers and your game will improve automatically because one is not wasting time with the inept (unless the inept is the excuse for no improvements)