The addition is roughly 600 SF and has been dried in already.

I'm not sure if there has been any dry cleaners next door many years ago but I don't see any around the block currently. 

I rarely use the actual stakes as I tend to put them on concrete or inside, but they attract a lot of ants and unlike the Terro liquid that goes on cardboard, it doesn't dry out nearly as quickly as the stake stations (I also add liquid Terro to the tops and four corners of the stake stations to attract more ants).The plastic bait stations are also decent but if they're on even a slight decline they empty out all over the ground.  

The dry land sits in the back and the only way to get to the dry land is through a 250 foot stretch of a neighboring property. 

This weekend I plan on getting the new section of roof felted so its dried in, and start tearing off the shingles on the old roofs.

second, your mold risk is much lower this time of year especially if its not heated now, but your gona have to dry it out before you rebuild,  having the demo done is a plus, but from what you describe, I would b a buyer in the $20's tops, i wouldnt touch $30K for my comfort level.  

It went well, but we never reshifted strategies here and that well dried up.

All exterior outlets and outlets within six feet of a water source should be GFCI protected.The bathroom exhaust fan was loud and should be serviced or replaced soon.Alarms and DetectorsThere were no carbon monoxide detectors in the home and one should be installed within 15 feet of every bedroom.InteriorSeveral windows were quite weathered and wornThe glazing was cracking om most windowsSeveral windows had weak or failing sash supportsThe left side rear window did not close properlyThere were previous moisture stains on the right rear bedroom ceiling that were dry at time of inspection, but should be monitored for action.

One of the issues is that the property is located in a flood zone, although it has never flooded and has a dry basement.

What I found out is that any any profession or vocation, if you're going to be any good, learning never ends and the reading required isn't going to be real estate novels in real estate, it will be dry, factual and more technically specific, like a text book.