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.

Another option is finding a property that a flipper tried to buy and flip and got his hand caught in the cookie jar. 

Will probably do the 2.2 lb bags of coffee from Costco for $16 and store them in nice jars.

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.

Quote from @Jarred Bowman: So let me ask this about KC from an out of state investor.