It is very obvious to me that your Husband was a special man, who was creating a special coop. It has the look of a small chapel, and makes me think of the Amish Bunkhouse my Sister in law had built in memory of my older Brother after he passed away a few years ago. My Mother created a small stained glass window that was installed in the front of the building in honor of my Brother. It is still a nice, functional little building but we think of our Brother everytime we see it. Perhaps you could do something like that with your coop? Don't hesitate to ask for help finishing this project! It is so hard to know how to help at a time like this, and a concrete project like you coop lends itself well to that dilema. This forum is the perfect place to get practical answers to your questions. I sincerely hope you have family and friends with some knowledge in carpentry that can help you finish your coop, in a way that will honor your Husband's memory and provide a haven for your Chickens.
I agree that panels made with 2 x 4's and poultry wire or hardware cloth are the best way to divide your coop. This will allow for good air circulation and easy visability. You might want to make them so they are easily moved (use screws that can be removed) in case you want to enlarge or reduce and area. Good Luck, and don't forget that you have lots of friends at BYC!