Your topic is a very important one! In my subjective view I don't know if I would do all steps like you described, but that is not important. I am kind of the person which says "Okay, when I think something is sub-prime, how would I do it different." But it is totaly okay when the article triggers this. I think there is no "one way", as you wrote too. A lot of depends on the working style a DJ want's to fulfill. Becoming a working mobile DJ (be compatible with the surrounding market) or become an artictic DJ and follow the own unique style. But however it might be; your article sets the impulses and brings light to some important work areas.
Every topic could fill a whole article by itself. I am looking forward for more articles!
RE: [ENG-ESP] Steps for your personal DJ Branding / Pasos para tu marca personal de DJ