Do you think this is something you could set up in a rental? I don't know much about security systems but now I am thinking it would be a very good idea! We have multiple computers
We obviously have access to the loft to run leads for electricity, and we used screws to mount the camera brackets in place. The cameras are wifi enabled, so once you get power to them, they're ready to go. We have two at our workshop, one at the front of our house, and one at the rear of our house. They just plug in to the nearest electricity outlet, and the signal is wireless.
Edit to add more details:
Our system is sort of DIY. My husband shopped for the cameras and bought
these for about £25-30 each (ours are the 720p ones, but they also come in 1080p).
We started out with some free opensource software, but it was annoying to use, so we paid for Blue Iris software. The software is expensive ($30 for one camera, or $60 for up to 64 cameras; we have four cameras), but it's much easier to configure than the opensource application was, and I'm glad I spent the money on it.