I second what Faith says about reading DR, that book would probably benefit you better right now.
I can understand your W's depression about her job, my best friend operates a daycare in her home and she is miserable for the same reasons your W is. Never getting out of the house, kids around 24/7, the damage done to her home, all of that.
I think it's good that you recognize some of your shortcomings and are working hard to change them. Keep it up, regardless of how hopeless you think your sitch may be.
We're all here for you.
"Everyone you meet has baggage. Find someone who loves you enough to help you unpack." ¤Formerly DelinquentGurl¤