Spray exterior heavily with pesticide to prevent bugs.Seal doors and windows, put up a few cheap Wal-Mart game cameras to keep an eye on the property until new tenant arrives.

I suggest to pick a NICHE and have laser focus while the auctions supports a spray and pray feel. 

To keep the moisture in, you can spray concrete sealant on it.

Get some AC coil cleaner from Lowe's, and spray it up there).If the water heater is working, again leave it alone.

However, some of the other rules, like don't spray sunblock inside the house, don't sit on the furniture with sunblock on, extensive quiet hours, etc.... make your rental unappealing.

I found that the walls can be poured one on top of the other using a non-stick spray in between so your perimeter problem would be solved.

I started rehabbing (removed trim around windows and base boards in living/dining room because they had been sprayed with texture, kitchen cabinets being torn out, doors taken off, walls were being skim coated, etc.), so with the exception of the loft area where my bedroom is, the place was a total mess.

They are not as cheap anymore as you would think, and they need a LOT of work - cutting for the windows/doors is a pain, the interior wood door has been sprayed with deadly chemicals, etc.

The first thing I would do is try spraying the walls and floors down with Natures Miracle and see how that does.

This is obviously more labour-intensive than the spray-and-pray method.As far as I know, there's no way of pulling lists of distressed properties, even though you can generally pull individual land titles for a fee.