Best is a layered system. Several different technologies overlapping. Using wired cameras, wireless cameras, door/window open/closed sensors, motion detection, driveway/walkway detection of people/car, glass breakage sound detection, smoke/fire/co alarm integration, water leak sensors ... Then local storage, cloud storage, email/text alerts... UPS where possible, wired internet, and for the paranoid backup 5g cell internet.
Do not disclose what you have, where it might be positioned, or brag about only spending $50 for it all. Consider generic security system sticker (instead of a specific brand) if you feel disclosing information is useful.
Position your cameras so they have overlapping coverage. Put some up high, others low. Have some totally hidden. If you have a camera DVR put it into a metal box that is bolted down.
Be aware that wireless systems can be jammed. Cameras and DVRs can be stolen too (evidence taken with them), so consider having footage stored in the camera, on DVR, and offsite in the cloud.
Make sure the system detects the right things, but does not generate false alarms.
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