We have a Nest thermostat to monitor the temp in the house and Nest security cameras on the exterior.

This could give you extra piece of mind.I have a wifi water heater, wifi thermostats, hardwired cameras.

My recommendation here would be to have internet installed in the property for $45 per month, and then set up several cheap WiFI cameras in various or all rooms of the property. 

I'd also get security cameras in the property stat!

For anything over 30 years, make sure you camera the sewer pipes, especially if they are cast iron or clay, as they are liable to collapse.

When self-managing an out of state STR (without a local PM), I get that a lot of things can be automated now (cleanings, locks, cameras, payments, bookings, etc).

Hospitable(messaging), Pricelabs(pricing tool), Stayfi(capture guests emails), touchstay(guidebook), ring outdoor camera

I am wanting to install a security system with cameras and entry sensors during the rehab process in order to deter break-ins and squatters.

I had security cameras installed on the premises, is that considered tax deductible as well?

Ask for the major cap ex numbers, roof, any plumbing issues, we typically camera the main sewer lines, one break of the line depending the severity and location your talking 20k plus easy.