It seems that you are commented to your plan. The one thing I would strongly suggest is that you try to keep a relationship with your children as best as you can, kids need both parents.

Some other things to think about, don't telegraph your intentions to you wife. Protect yourself, that doesn't mean you have to be mean to your wife, but don't give her the opportunity to make a "first strike" in the finance area. Make sure you know EVERYTHING about all the financial information that you can. And at least consult with a lawyer, many law firms will offer a free consultation, doesn't mean you have to use them or any lawyer, but information is power and you need to be prepared for her to strike back with a vengeance.