Farmers are regularly murdered in SA and the lesson is obvious. Having a remote property far from neighbors is not necessarily the safest choice in a disorderly world. It's why farmers in the darkages clustered together in small villages. But if you wan't to know what really works in that environment have a look at the small town of Orania in SA.
It has a population of around 2500 people and no crime. That's right, Zero crime.
It is the role model as far as I am concerned and I live in a rural Australian town of similar size and makeup. I'll add too that I did have a rural property, 100acres, but the odd walkins and thefts convinced me it would be a bad choice in the long run. This thinking doesn't sit well with those who have followed the prepper mantra that a remote and isolated BOL is the logical endpoint.
https://en.wikipedia.org/wiki/Orania,_Northern_Cape