Hey Hunter, we're on the same path! I quit the corporate life back in October and I'm now setting up a hypnotherapy practice. I had the same thing - did very well in the corporate realm for 10 years, doubled my salary, got a great reputation etc., then a couple of years ago found out that it just wasn't me. The financial and social safety and security of a career are actually a great risk to a creative type - much better to get out there, do creative stuff, take risks and be free. Feeling trapped in a gilded cage is much worse for you than being free and relatively skint.
Your thing with the yoga sounds brilliant - it's going to fascinating and very good for your body and soul. The practical advantage is that yoga is now a very accepted art and more and more people are doing it for their health. Doctors, physios and osteopaths recommend it to their patients. So, there's a living in it. And training in Vegas baby! Major cool points there.
Good luck man, I'm sure you'll do great. Do remember to get rid of any corporate competitive tendencies before you start though. Apparently punching the air and shouting "Yay! I am the serenest!" at the end of a yoga session is considered bad form....