Nest cameras (indoor / outdoor).

The answer to that would help me personally focus on where I might focus my efforts.I agree that an alarm system would be pretty pricey - I'd probably go on amazon, find some fake security camera domes, find a couple "Smile, you're on camera" signs, and put one of each up at key entry points around the property.Side note, make sure you disclose the break-in to your end buyer once you're in escrow, in order to protect yourself.

A move-out walk through with the landlord is an anachronism left over from the days before digital cameras.

I would add security cameras to my home, which any landlord should have as a precaution.  

Looking forward to reading opinions on yearly or month to month options)Accepting Monthly Payments Security (Outside Cameras, New locks, etc.)What am I missing? 

So gas is required for ADU since july 2018 ( new ordinance came out).gas, water, electrical and you can add sub meter, sewer must be connected to the outside of the house, so for anyone doing that I suggest you get the company to tell you where the sewer is running, they pretty much run the camera down the clean out pipe and you figure out where to connect.

So we installed a security system and cameras.

My initial thought would be a tamper-proof camera system.

Hi there, I was curious what cameras people might use when doing new construction. 

Get the ring doorbell camera  it can be installed wireless and connected tO your WiFi.