I noticed that Zillow now posts these "pre-foreclosures" and color them Red as if these were active listings on the market, when they are not...Anyone figure out what is the purpose of these, and how to use this information?

If they did not discuss this possibility with you before hand and simply included it in the contract, then that is a red flag and in my opinion a deal killer.  

I'm concerned about evaluating the business that quickly, and of course the red flag inherent in a seller trying to "rush" things along. 

I know they have locations in Manchester and Nashua, and might have others in Concord or near the seacoast.What you sell it for will depend on where you move it to some degree.All of this, of course, will take time, so if you get it under contract and make the sale contingent upon getting all this squared away, make sure it's clear in your contract who is paying the current park fee while you're doing it.I hope that helps!

Some do desktop underwriting, which is akin to the Zillow estimate, because no one comes to view the house and the value is from recent sales and Price for the square footage. 

Fine at the higher end, when it's comparable to other units, better make sure the rooms are square as the eye picks up the imperfections much quicker running an angle to an intersecting plane, especially in in an empty room. :)

The fact that he apparently wasn't going to rent one to her and her boyfriend, neither of whom could document their income, was a big red flag.

I painted the door & trim around the front windows a nice, rich red (because I couldn't find cheap shutters that were big enough!)

Pick a criteria for ex. like 3bd 2bth 1500 sqft then look at similar houses in the same neighborhood or least within a half a mile with same amount of beds and baths and couple hundred feet within the square footage.

Are you including all your building permits and fees in with the cost per square foot?