hi, the discussion about coop height got me to measure the height of my coop. It is at 35", and the hens just fly right into it when the big doors are open. I think 40 inches high would really be just fine! I tried the wheelbarrow idea of yours when I cleaned out my coop yesterday, and that is a great idea. To get back to coop height: Hens instinctively want to go to a high place at sunset, to be safe, so a coop that is a bit high up feels good to them. For me, 35 inches high is comfortable for cleaning access. I added a pic to my "Deedee's Inn" album that shows the roost and little ramp I have in their run that gives them access to their coop. It is the second-to-last picture. I also thought it might be a little more rodent proof than a ladder, but then I saw a mouse or small rat run up the hardware cloth one night, and realized that rodents can access anything via the hardware cloth. A roost definitely stays cleaner than a ladder (poop).
My hens like the various roosts they have in the different runs for daytime hanging out, and they seem to love their coop roosts for the night. I don't have roosts in their yard because I don't want to give them any help flying out over the fence around the yard.