If you are looking to clean the coop floor, just install a man door for access because you'll want to get in and inspect the coop, check birds , woip things down, etc. Remember to put a litter dam across the opening to keep the litter back and not block the door operation.
For poop board cleaning, how about installing a drawer the width of the roost bar that rolls thru the wall or simply a groove to slide the trays in and out. This gives you easy removable access (real easy if they are lined or are cookie sheets that lift out)
To clean the nest boxes, design them with a outside door so you can line them with a wash tub or cake pan in them to lift out and clean.
Remember poop boards and nest will catch about 75% or more of the poo in a coop so having them easy to access and removable will make cleaning a snap