Who ever invented the saying "Sleeping like a baby", should get a kick in teeth!
I remember the same thing when my youngest was that age. It may not seem like it will end, but it will.
I would keep trying the bottle and that way both of you can share the responsibility a bit.
If you can swing it, hire a housekeeper once in awhile, to help your wife with the stress levels.
I remember your feeling. The worse for me was the occasional feelings of resentment towards my baby, followed by extreme feelings of guilt for feeling that way.
Man, parenthood is a crazy ride. That being said, I could never picture anything else!