Ive found Dog Barking to do very well as a deterrent to casual criminal activity.
ebay.com link: Guard Dogs Random Barking and Growling Dog Sounds for Added Home Security
Ive been through Trip Wires in the 60's to UL systems at work.
Even been burglarized successfully, with top notch systems.
Its for Peace of mind, and have installed Costco systems, mostly, when on sale.
So the question becomes under $1000 with all you need, home done.
A professional service to monitor or not.
In the end, yard signs, window decals, beware of dog, and if needed, "barking and growling" has served me well.
Add some GPS trackers, if it helps you, to expensive items, video and paper document before a crime, and insure as best as possible.
Seen too many friends leave their home and watch the video links excessively when out, so Paranoia can be a minor issue too.