When I was growing up one of my best friend's father had a small, commercial chicken/egg operation. Not of the caged variety, the birds(between 50 and 75) were housed in a fairly large--50 X 100'--coop with an outdoor pen about as large. Every two years he sold off the birds in the spring and got new ones. Then, and only then, did he clean the coop--I remember it well because it was my friend's job to do it and, somehow, I always got roped in to help. The point being if you give your birds enough room and are diligent about adding bedding, you shouldn't need to clean as often. Not that there is anything especially wrong with doing it more often, it just isn't necessary for the well being of the birds. If, on the other hand, things get messy and smelly very quickly I would suggest maybe you should increase the size of your operation or cut down the size of your flock.