Have you done a cursory analysis of the benefits of setting up your own practice? If you have, you probably compared your net payout now to your potential net payout on your own. While that is useful, there are also very intangible and unknowable benefits that can emerge with the flexibility of being a business owner. I talk about 6 of the big ones that have made an enormous benefit in my business and life.
When you first contemplate what setting up your own practice would entail, it can seem overwhelming. I've been there, done that, felt that way, etc---and lived to tell about it. However, I can boil the vital ingredients down to just 3: make sure you learn from OTHER people's experiences (and mistakes), make sure you have a backup plan for your business (or more accurately, for your LIFE!), and make sure you build in optionality and flexibility in the early stages of your new business.