Really sorry to hear about your tribulations. Lights, cameras, sirens, and alarms can be deterrents.
Our local police have basically stopped responding to burglary alarms. I know folks who've reported response (if at all) times of over five hours. More recently, the PD has announced that it will take burglary reports, but will not respond to most alarms -- which have to be registered and require a fee. Now I have two friends who have hired private, armed security services.