This is such a difficult thing for anyone who raises chickens. I decided once I got started that if anyone was going to eat my chickens it needed to be my family. I decided I wanted to be the person responsible for the beginning all the way to the end.
Of course, I'm raising so many chickens now that it is impossible to eat all the chickens we don't keep so I've gotten a family involved who processes the chickens for poor families. Their church gives these birds out. Most of the families are destitute because they are not legal immigrants. I like the idea of children getting a good meal out of my extras.
There are some basic ways to make this easier on you and your chickens. First, chickens are designed to be less stressed at night. So, we do our processing when they can't see what is happening. MUCh easier on the chicken over all! Also, they live in their environment until the very end. I think this is much more like a predator would do in the wild but even more humane.
Keep your chin up and keep in mind that you can be in charge of the process by just getting to know your community. In the end, you can't keep that many roosters. They WILL kill each other if you do and that is worse I think.
Hope this helps.
Dave