I don't have kids, except the ones I work with. I work a lot but also play with friends, hobbies, etc. Do work you love and enjoy. Look around until you find your passion. Then work hard at what you love and the results will be grand.
Money is a bad goal.
Money comes when it is not the goal. Just work hard, treat people well and the money part will work out fine. Don't be afraid to get lost now and then.