There are times in your life when you reach a crossroads and you have to make a choice. This thread reminds me of a similar choice I was confronted with. Many years ago I was an IT manager for a large chemical company in Texas. I was making good money, but I knew I was never going to get rich from working for this company, and I knew my prospects were limited because most technology decisions were made in Germany (home office). On the side, I was working with a very talented interior decorator, creating custom art work for corporate office buildings she decorated. Yes, my first degree was an art degree; I had planned to be a commercial artist before I went a completely different direction. Anyway, it reached the point where I was making about the same amount of money with the art business I was making at my full time job, but I was working 7 days a week, 12 hours a day. I was burning myself out and had to make a decision; art business or IT manager? I felt I could not do either job "half way", so it had to be one or the other. I chose the IT manager path and never looked back. In retrospect (now that I'm retired), the path I chose was probably the best for my financial security, but perhaps not my legacy.
The thing about artwork and DJ services is that these are things people can and will sacrifice in times of recession or other extreme circumstances. IT is a field that has never declined even through recessions, after tornados or during wars.
My point is this; if you feel like you can make enough money to sustain yourself, your family, and save for your retirement with a DJ/Entertainment business, then by all means, go for it. There's a lot to be said for being able to make all the important decisions that control your life. You'll likely never become wealthy as a DJ Business owner, or an artist, but you also are unlikely to become wealthy working for someone else.