KNOW the area and the neighborhoods that best line up.Don't be a dirtbag to try to manipulate a sale.

She had issues though this month (Jan) due to the subzero temps. 

@Austin Sanders Someone coulda' left a window open, setting temp to 78 is a good idea when not there.

You can also try using a temp gun along the path of the duct on the ceiling to see if there are sudden temperature fluctuations.

How long would it take you to work a Temp Job and make $15,000--that's not very much.

Make sure you do your own homework the numbers given by the seller are usually manipulated in some way. 

I recently purchased a small lake house in IL, which is sort of vulnerable to winter temps (= very lightly insulated crawl space where all plumbing is located).

Mini splits have been around a long time and with the newer tech they control temp and humidity very well and are also come in higher efficiency ratings than standard split systems.  

In hot Arizona the key to keep cool is thick walls and no leakage of inside temp.

I have these 2 deals and am just wondering your take and what you would do...Deal #1 - Tampa FL Duplex (3/1 house with an attached 1/1 apartment) - Purchase price plus minor rehab/loan fees/temp financing fees (interior paint of 3/1, changing some light fixtures, some minor cleanup) I will be all in at $125k.