Hi Stumpy: After reading all the posts above I can see that you have received some excellent advice. I sympathize with you about
your work situation. I have been there in the past and I understand how miserable and disabling it makes you feel.
I like everyone's ideas about having a set date/time to talk with your wife and especially your children. I'm not sure if you have the capability for this, but since you are away from home so much it might be more rewarding for all of you if you could talk via Skype. That way you and your kids could keep up your connection.
Hang in there and as hard as it understandably is, try to find at least one positive in each day. It might help keep you going.