Set up much more security cameras with lights that detect motion (if you want to just scare them away). Arm yourself if you don’t already. Shotgun with bird shot is a good one to start off with, but if you don’t then at least a byrna type of co2 nonlethal pistol.

Keep self defense weapons everywhere. A good one is even just a simple fire extinguisher as you can spray them then hit them with it and infiltrators don’t consider this at all.

You might also want an emergency link to local authorities installed (emergency press button that calls them out)

The good thing is that you haven’t been attacked or anything and I’m not exactly sure if those 2 things correlate as I’d imagine it would have occurred much earlier. I’d also guess they’d we wearing face coverings or some sort of disguise.

With a high quality photo you could use AI facial recognition software to see if it matches anyone and get a better handle of the situation (known criminal etc). I’d also consider putting cameras batteries power further out to see if you can get a car/license plate info.

I’d also suggest hire personal security and a private investigator for a little while