I've been freelancing on the side for over a decade, but when my first born was around one I started really pushing it, I currently try to work between 10-15 hr

I've been freelancing on the side for over a decade, but when my first born was around one I started really pushing it, I currently try to work between 10-15 hrs on the side when my kids are sleeping. It takes time to find a pattern that works for you, your clients (if you have clients), and your family. Communication is key for this, your spouse has to be 100% on board or there is going to be resentment on one side or another. Unfortunately, when you have a family, any time you put towards work will take away from your family - there is just no way around that. Even if you're with your family, if you're on your phone then your kids and spouse will notice that.