Would a backyard fence be good for family with small kids and pets?

A "D" in another region might be an inner city 'hood with a majority blue collar population.If you grew up in a D or F your perception of what is truly bad is going to be different than the perception of the private school lacrosse kids.

She states retirees prefer the first floor (though there is an elevator) as well as families with kids.

You should be flexible (ie if they have small kids, avoid nap time). 

You could also build a relationship with the neighbor or if its a college town find a college kid and offer him money to do daily checks at the site to make sure work is being completed.

Next-door Neighbor convinced, the rest of the neighborhood that Mother-of-Two and her kids should occupy Owner Gone’s home -at least until she recovered financially from the fire and loss of her own home.

Even if just one of the buildings, maybe by having a PM just take one building will help me a lot during my busy, young kids, season of life. 

The guy screws me over with his own discretion, his kid goes to jail. 

Living in a renovation for an extended period of time tends to annoy the wife and kids.

It was a tenant of a SFR that was behind on rent and sued me because he said mold gave his kid asthma.