And who or what exactly do you propose will do that and to what purpose?
Are you serious? A farmstead/estate will be like a combo supermarket and hardware store to desperate wanderers.
Who may also have scoped deer rifles, and a lot of patience. Just hide in the bush 400 yards away, recon who comes and goes and when, then shoot the biggest man who seems to be in charge.
Even if it doesn’t work, (say, you call neighbors adn they rescue your family and roust the bad guys), Dad is still dead.
Or do you have some super NV/FLIR setup, operating 24/7 in 360* in automatic mode, that will alert you to every human approach within rifle range of your abode?
Or do you have enough troops living at your house to patrol the rifle-range distances 24/7?
Most people don’t.