I am sorry that this has become such a problem for you and your family. Your health has to be a priority and if you don't take care of yourself, who will take care of your family??
It sounds like you and hubs have had a talk and things are a little better. His story is so sad! What kind of people would do such a cruel thing to their children? It certainly sheds some light on his attitude. Nevertheless, you do have these chickens and someone has to make some basic decisions about how they are going to be managed if you guys do decide to keep them.
It would be great if you could make it a family project and involve your children. You don't say how old they are, but if they are big enough, give them some of the responsibility for the chickens' care. IMHO, that is part of being a family. If you get rid of the chickens, I'm afraid it will cause lots of conflict in your marriage. I would be furious if my husband got rid of my chickens.
Good luck, and I hope this all works out for you.