When my parents retired they sold the family home (they had outgrown it anyway) and bought two mobile homes, one in a local senior park, and one in a senior park in Arizona. They chose parks because they figured they would offer greater visibility.
It mostly worked out - all except for crooked park owners in the local park. I like your idea of the security system but wonder what good it would do me if I have no one near to respond to intrusions?
There is always the local police dept. or sheriff’s office to respond.