I wanted to add a note to my
recommendations, specifically for cameras. Whatever system you use, it'd be good to buy a batch of
decoy cameras too.
Ideally your real cameras remain hidden, and you have decoys in spots where a paranoid lunatic will expect them. This is good both to deter casual harassers, and to give the lunatics something to shoot at to give you warning. Real cameras work just as well but are obviously more expensive.
If you've successfully limited the approaches to your house, put a decoy up to watch the entrance. The real cameras should be watching the entrance from an unexpected angle, plus the spot where one would attack or walk around to avoid the decoy's line of sight. Then another real one halfway to the house, hidden as best you can. Then multiple decoys on the house itself, and a camera watching the exit of that approach and/or where you would move to avoid those decoys.
(If needed add a little extra to the house and entrance decoys, like blinking LEDs or wires running "into" the walls, to make them hold up to scrutiny under surveillance.)
The idea is to have proper full coverage with real cameras, to provide the advance warning you need to bail out, with decoys forcing the enemy to give you warning or slow down. Either one gives you more time, for very cheap, if you can map out a good psychological barrier with them.
