Your property won't fit it?
Perhaps you can share what you have that allows you to free range over 30 birds? How much land area, what type of cover, etc.
Some will argue with me but my take on a true free range flock is losses are almost a given. Not if something will wipe you out.......only when. Predators hunt for survival and are quite good at it. Chickens are helpless prey. So allowing predators a clean shot at them is a recipe for disaster.
A better plan is to "yard" them during the day. Confine them within a zone of protection that allows them to run around a bit, yet keeps the worst predators out. I use an electric fence.....going on 3 years and I've never lost a bird to a predator yet. Just saying......