@Edward Badal I would recommend using a site like truepeoplesearch.com it's free and pretty accurate, it also allows you to track down the possible known associates of the owner and their contact numbers.Buying a burnt house is usually going to be a tear down the framing isn't structural enough to keep. 

Liability for fencing is one thing, keeping it in good condition to normal wear and tear is really on the land owner, not the tenant, damages are something else.As to tenants doing maintenance, a minor fence repair is not a capital expense really, it can be expensed off, minor issues.

Your turnover cost when they leave for wear and tear, potential vacant time etc really eats away at your profit margin when you do a shorter term lease

The entire carpet, baseboards, bathroom tiles, floorboards in the second floor need to be teared out in addition to the ceiling and wall on the first floor.

In one place I lived (Tucson) the building department had a friend of mine tear out the extra room he had added, because the work was not inspected nor permitted.  

Suppose those units that are tears downs have an ARV that is lower than what it would take to demo and rebuild?

and of course the Indy turn key stuff is 80 to 120k... also they can go right over existing so you save on tear off and they are light so its not like stacking multiple asphalt and bowing your rafters. 

Is the extra wear and tear on your house worth an extra $125? 

I mean people tear their houses apart all the time remodeling kitchens, bathrooms, flooring, rearranging the floorpan, etc.

Also be aware that problems can spawn into bigger problems as you start tearing into them.