psrumors, can you use a trunk drip pan thingy(you put it in the trunk of the car to set yucky stuff on) for the coop poop? Tey are made out of black plastic. Kind of like what goes in the bottom of the dog's metal kennels that pull out. Or a rabbit hutch bottom, same idea, deeper pan.
I was going to get the rabbit hutch pans but the ones I found were in clearance for 10 bucks! WOO HOO, I love Clearance. Anyway I bought a couple at the Orscheln's store here and they are like 3' by 2'. they are an inch or 2 deep. I bought them for my future call duck pen so we can put water in and let them splash around and get out on webbed flooring so they don't muck up the coop area with muddy water.
It might work as good for a poop tray!
Don't forget linoleum for the flooring, makes cleanup so much easier!!!!