Best of luck Ben, I can only imagine the pins and needles you're on about this venture. I've wanted to do the same thing for a while now as I know just how hard it is to juggle a full-time job, a ton of freelance work, and still maintain your sanity.
Every time I consider the possibility of going it on my own I get cold feet at the thought of not having a consistent paycheck coming in every few weeks. You will no doubt do just fine as your work is incredible and very inspiring. As long as our hobby exists, guys like us will have work to do and being able to fully commit to it is a big advantage for you. Maybe in a few years I'll get to make my passion work my only work too!
Again, best of luck to you man!
Kris