That way you can build the other infrastructure first.... fencing, gates, access control, cameras, management system and all the expenses that don't really generate direct income but still have to be done. 

Immediate installing of cameras in common area and exterior with simple notice email / signage.

@Marcus Auerbach  While I agree that todays rates are low by historical standards, current property prices reflect those low rates and the payments associated with them.Personally I expect prices will be sticky on the downside but the time of annual double digit increases is coming to an end.

Sell digital products.

.- Unlock by entering your 4-8 digit PIN code on the backlit, touchscreen keypad, with the physical key, or through your smart home app- Works with Z-Wave smart home or alarm systems including SmartThings, Wink, Vera, Honeywell and Iris.Voted #1 Smart Door Lock brand for 2017 by CEPro- Adjustable latch.

I wanted to ease her mind by getting security cameras for the outside. 

Installed ring security cameras years ago.

The last 12 years have been pretty strong for the rental market with increasing rates every year and some years with double-digit increases.

However, I also have clients in Boulder, that have had similar success with digital nomads over travel nurses/professionals.

There have been times in the past that the vacancy rate was mid double digits (~15%).