Mark has a good point.
Those who are making 6-figure incomes as a Disc Jockey......are spinning a LOT of plates.
Either they sell DVDs, or they give seminars, or they have gone multi-op. Or maybe they're building additional revenue streams (photography, video projection, clubs, schools, giveaways, whatever).
I would have to charge THREE TIMES my present rates, to support our family, if my wife wasn't bringing home 90k income.
Of course, if I charged 3x.....I'd have to work 3x as hard to book the events.
So there is what you call POINT OF DIMINISHING RETURNS. You can hobnob with wedding invitation printers, go to chamber mixers, do bridal fairs, spend maybe 20 hours a week on generating business leads.....Of course it will produce returns but at what cost? (time away from family & household duties)
HOW MUCH DO I NEED TO CHARGE? it comes down to what you think is a fair, an amount I'd be willing to pay if I was in the shoes of my customers....I've calculated a rate of $115 per hour of coverage (coverage= setup + teardown + playing time + consultation).
But if I was the sole breadwinner....we'd need to boost the billable hour to around $200 or MORE.