It's easy to clean, especially the barn...as they don't hang out up in there much. A few of them actually sleep inside, most of them sleep on the ladder up into the barn. My avatar is of the gang settling in for the evening.
They keep the dirt in the run section so stirred up that there hasn't been any chicken smell. I sift a bit of food grade DE in there weekly to help dry up the poop and keep the flies at bay.
Soon as we get the main run finished, the Barn will be home to our 5 Silkies...until we get the next one built, which will be a bit bigger than the original one. Then the original Barn will house our pair of Black-Tailed Buff Japanese.