Great coop and great restraint on getting your setup before you get the birds. Like many people here I got my chicks and then hustled to get the coop built. It is suprising how fast they grow when you are trying to finish the coop.
If you feel you can't kill your chickens you may want to consider sexed chicks. Straight run chicks (unsexed) will be apx. 50% roosters. I was suprised how hard it is to get rid of roosters. I'm talking...I couldn't give away pure-bread Black Copper Marans from across the country. I did, however, manage to trade one pure-bread Ameraucana for 2 drake ducks....at least that is what I told my Chinese wife. They would have given me the drakes anyhow, but my wife thinks I made a great trade...and I got rid of a rooster.
I personally have no problem killing a chicken and have become the local "hatchet man" for neighbors that can't do it. That is how I got the free ducks.