I’m 41.
Been working my day job successful career as a project management business consultant. I’ve been dj’ing hard for 10 years in LA (as Robtronik for the most part).
It is a trick to balance the desire vs. responsibilities. I’ll be honest and say that I made a mistake with my marriage of 9 years and let my desire to want to succeed in the music ruin my marriage. I lost that balance. I have an 8 year old son too. This happened 3 years ago. There isn’t a day that goes by that I don’t think back to those two years or so and fix some of the things that started to deteriorate.
The good news? My ex-wife and I are now good with each other and at a minimum, are good friends again. This helps with my son and him still having a family unit.
The joke used to be: Techno is an unforgiving mistress.
It’s true, it takes and takes and takes and if you aren’t careful, you can lose sense of perspective. So, be passionate about your art no matter your age, but be very clinical and logical about what price you are willing to pay to have your art be heard (as a DJ/mixer/promoter), whatever it is.
I’m a better person now for going through the lessons of life - and frankly, the past is the past. But if I can impress on you this (those with families and children, married, with jobs), just be honest with those around you at all times your intentions, what you want to accomplish, and then find a way to meet most of those goals with their input as well.
When it is a team effort, with compromise involved by everyone, but a larger goal that you can agree on, it works. It may take a bit longer to achieve, but it isn’t a race - its a long walk, a long journey that will hopefully give you lots of return and happiness along the way if you take your time and be diligent about moving forward in a patient, but persistent, way.
I don’t think age matters one bit. What matters is your passion, approach, and willingness to balance and move ahead without losing perspective of the larger picture.
I’m happy now, but boy did I pay a price for not following my own advice above. 
Do your thing. It’s possible.