No need to ever 'hose' anything out, you want things to say as dry as possible inside the coop or you'll have odor and maybe mold and other organism growth issues.Then I could just clean it out and hose it down.
A concrete floor is pretty good for scraping out without the need for water
How you manage your manure is key to how to bed the floor.
I use a poop board to remove much manure daily(goes to a friends compost),
then dry shavings on the floor changed out twice a year.
Any chance you could enlarge that coop, push it out a couple feet on the run side?