I am agreeing with Ryann and Kimberly. You talk with your wife, being honest with her about what you need to do to be happy. You would hate to wake up in five years, or even one, being resentful that you didn't follow through on your dreams. But make sure the decision you are making is what you are really wanting to do, and that you're going to be able to be the man you want to be for your children, and yes, your wife. I could never imagine not supporting the person I was married to in their career - even if it wasn't exactly what I had hoped for. Your wife is also in a hard position, so listen to her thoughts and fears and talk it out with her. I wish you the very best of luck.