Eucharisteo-
You are working so hard to nurse your wife back to health and provide a healthy home for your family and protect all of your loved ones. I still go back to what I said before…I think it would be the right thing to do to find the dog a new home. A no-kill shelter, or a friend with acreage may be just the solution, for your family and for a happier dog. There is no reason to feel guilty. The health and wellbeing of you and your family should come first, and you have made it clear that is your highest priority. I know that there are a lot of dog lovers who keep advising you to train the poor beast, but really, you have to spend so much of your time and energy caring for your wife and kids, that I don’t know how you would manage a new training routine.
It disturbs me to see what I perceive to be name-calling and harsh criticisms and medical evaluations of you or your family members going on here, especially since you came here seeking support for a difficult situation. It must be so hard for you, but I can tell that you really want to support your family, even if that means telling them “no” when they want something that is not healthy for them. I will say a prayer for your family.