Security Camera for the safety of elders- Any thoughts?

I use Zmodo cams to keep an eye on my parents indoors, and I know they also make cameras for outdoors. They are wireless and have audio and I can watch them on my phone app and even talk to them, although the audio isn't great. In general, I've been pretty happy since they were pretty cheap also. :)

If you have a reasonably good internet connection, I like the ring system (www.ring.com), particularly If you want to start with exterior coverage. The cameras can run off their battery or it is fairly easy to drill a small hole through a window or door frame (or attic wall) to feed a small power cable through. They operate on software adjustable motion detection and can be setup to send alerts or you can activate the camera remotely to just look around. The devices/systems cost $100-200 each (doorbell, spot lights, security system); you can start with one and add others later with monitoring for multiple devices just $10 a month. The feed is streamed over the internet in real time so even if someone steals your camera, you still have the video of them approaching the camera. I particularly like the ring video doorbell where I can "answer" the doorbell from miles away and have a conversation with the person at my door. There is even an option to set up a "neighborhood" of cameras where you and your neighbors could view the feed from some of each other's cameras. Basically Ring is a fairly easy to install flexible system where you can start with just one device and easily expand to use as much or as little as you want. You can use either a smart phone or a tablet (or both) to operate and monitor the system.