First time chicken owners. Chicks are ordered and will arrive in few months. Need recommendations on shed amended into a coop vs overez prefab coop. 15 chicks are ordered but I realized that the hatchery will likely send up to 18. Weve been pricing sheds ($3600-5400, no joke), had a contractor out to give us an estimate for coop/run. We are needing this coop and run to be 'Fort Knox' as we all every predator (pack rats, rattlesnakes, racoons, coyotes, cougars, bears, and tons of predator birds), extreme wind, snow and extreme cold temps in winter and extreme high temps in summer-north central WA. My concern with the OverEz is that will not be sturdy (or large) enough and with the run from them, the cost is $6k! Thoughts? Thanks!