imo there needs to be a reason for having 60 chickens lol .. if you dont have a good reason, its just like owning 50 dogs .. you got to feed them and at some point 'cute' isnt a good enough justification .. thats said yeah a good free range system will cut costs depending on time of year, and thats assuming you have probably 5 acres to support that many foraging .. winter if your froze over nothing you can do, theres nothing to forage .. other than that you can promote growth of grass and tender shoots maybe spread out something cheap and easy to grow like alphalpha in a partial shaded corner and water it daily, again 60 chickens is alot and will require a larger operation than 6 .. instead of a 5lb bag and casting some seed by hand over a 30 ft area you need a spreader and a couple 50lb bags and tow it and instead of a single sprinkler your gonna need a system with several .. like that .. you want lots of chickens then figure it out lol ..