As you contemplate making a change, I invite you to find one or more people who will wholeheartedly be on your side. Then tell them what you are up to, and ask (out loud!) if they will help you through any rough spots.
In my practice I have seen that people generally make lifestyle changes in one of two ways. Neither is right or better. However, it is valuable to know what group you fall into so that you can plot the best course for making changes.
I just left a 14-year career at Intel Corporation to ride bikes around Iceland with my wife and two children. I didn't make this decision on a whim. It began three years ago, when I decided to review how I prioritized my time.
I had to let go of all the baggage that was literally weighing me down. I needed to pull up the strangling roots steeped in another era, when I was once physically and emotionally responsible for the health and well-being of three other lives.