Don't rely on a single tenant verification service.

Your numbers are simply not worth the paper they're printed on if you really need to rely on a home inspector to tell you about the property's build quality and condition.

While working on the house last week, a woman and her adult son stopped by to ask if we would be renting soon.

If you really want an answer you can confidently rely on you'll need to engage an attorney practicing in the state the property is located in and the state of residence of your grandparents and have him research the specific facts of the case.  

Put up a light with motion sensors, but honestly if one of the adults is sneaking out the back in the middle of the night-that is silly-why not walk out door like a normal person. 

This is something i've been trying to define myself as I don't want to rely on the first come first serve method. 

Open to group home, adult day care, senior living etc.

That probably means sellers will more often rely on the X% that folks vaguely believe to be the industry standards. 

I haven't heard back from insurance company yet whether they need a re-inspection before they insure the property.Would you rely on inspector or a roofer/roofing company to tell me if there is roof damage? 

One of the major issues with Zillow is that their Zestimates often rely heavily on a price per square foot basis, which can be quite inaccurate.