My elderly parents live in a two-story home. Although, the city we live in is pretty safe, we're the types who believe that no place is crime-free & we definitely aren't the types who leave our doors unlocked. We take precautions: Dowels in window frames & sliding glass doors, being watchful & alert, etc. My mom would have a dog if she felt like caring for one & they weren't "so much trouble" as she says. She's tired enough taking care of my dad. I mentioned to her about cacti around the outside of the windows. I told her my little device I put between my door & the frame every night. She's looking into possible alarm companies in which she pays a reasonable monthly fee. She doesn't want ADT. She doesn't think they're that good. Any ideas...both monthly fee companies & home devices, etc.?