Definitely consider installing even fake security cameras, they will help to deter unwanted visitors.

Pay to have a plumber camera the system to check for broken pipe as well. 

We have resources to answer inquiries, local people to do in person check in and more, dedicated cleaners, off duty police officers to handle noise complaints, and am hiring offshore resources to better monitor noise meters and cameras.

First question: I have outdoor security cameras with one facing the pool area.

I use a porch camera to verify who made made the booking is who checked in.

If you ask the tenants to assume the charge, they may also (this actually happened) take the security cameras when they leave ("but we paid for them"). 

One other thing, you may want to check is since most cameras these days have 4K resolution, you will need a computer and software that can handle it.

Then, sometime last year, someone stole an expensive wilderness camera and battery he had set up near the trail.

So I just figure they're getting the inspections off camera and not showing the real problems.Come to think of it, I've never seen one of those projects fail.....hmmmm...When I was doing all the high-end building, I would have a lot of clients come to me and ask why I wasn't doing _____ like "we saw on HGTV last night".

This includes exterior lighting, security cameras, storage areas that can be accessed by both tenants, washer/dryer areas, as well as any common hallways.