Ttatt it's not just anxiety, it's reality. They're not going to get those childhoods back. It's true he shouldn't make a rash decision, but it's a good time to plan.
cappytan, try to leave before the kids are in school, if possible. Your wife sounds like she's coming along. At the very least, she's a liberal sort of witness and that's a really good start. Maybe the next time the blood issue comes up, express your discontent with it. Ask her if she would let your kids die. Dont be too strong on it, just get her thinking. Your situation looks really hopeful compared to a lot of situations on here.