He was thinking about adding a gps tracker onto it for safety. 

I am a fan of checking in occasionally to make sure the cleaner is on top of things and to do a walk through to check safety things like deck boards and steps, railings etc.

From either a safety standpoint or because the property couldn’t meet my standards of being a nice place to live (not a slum property).

I am going back through the signed Pet Agreement and I do have two statements pertaining to this that read "Tenant will not allow pet(s) to cause any danger, damage, nuisance, undue noise, or health hazard," and "Dogs: Must be controlled at all times.

The original lease has addendums (several pages) for Lead Poisoning Prevention Act and Disclosure of Info on Lead-Based Paint and Hazards. 

Research specific neighborhoods for safety and rental demand to ensure they align with your investment goals.Hope this helps.

You need more space and more safety than say, a regular single male would.

Get creative, buy a $200 security system and place them facing the common areas and exterior of the property for the tenants safety.

The bigger risk is your title insurance and hazard insurance.   

However, here are some considerations:Permitting: Unpermitted structures are often a red flag for lenders because they may not meet local building codes or safety standards.