Have you researched deep litter? Or poop boards? I use a tray under my roosts filled with Sweet PDZ (stall refresher) and just scoop the poop like cat litter. (They're removable so I changed the orientation in these pics)
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Seems like water on the door would be very heavy, might be better with a bucket on the floor. Water also doesn't have to stay inside the coop. It can be outside on the ground. I use horizontal nipple waterers and they don't drip at all. And my diy PVC feeders don't waste any food either. My runs are fully secure so I keep all the food and water outside.
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Gotta say I love your coop!