I have a monitored security system that covers the basics: door and window, plus a timed disarm on entry. Importantly, I have stickers on my windows and doors alerting would-be burglars to that fact and this is effective at turning them away. I have caught a few characters on video scoping my property out and then walking away, which leads me to my next recommendation...
I have a few Amazon Blink security cameras installed outside the house. One at the front, one in the yard and one fixed directly to a tree overlooking my parking area. They are low cost, wireless, and easy to install. All you need is wi-fi. I don't advertise the fact that I have cameras, as it works best to catch trespassers off guard, and then pass the videos along to local authorities. They get the message soon enough, as the police generally know who they are and pay them a visit. In my experience, it also results in more patrol cars in my area which then lowers criminal activity in general.
The last think I did is to get lights around the house. I have dusk-till-dawn LED lightbulbs at both the front and back entry. I also purchased a few low cost solar motion lights on Amazon and installed them by the gates.
I have found all of these easy fixes to be very effective deterrents. Good luck with your challenge.
