If you don't have the yard square footage, things get more complicated fairly quickly.Having been through the process a couple times already, I would recommend having Kekai's Pumping or Akamai Pumping find the cesspool and check it out before closing to assess your risk of near-term failure.

If you are considering this type of investment, the quickest way to analyze cash flowing properties would be through the four square method. 

For their area, they analyzed a number of rehabs that a particular team had done, then estimated the cost of rehabs per square foot after they completed the projects. 

Certain things like number of bedrooms square footage and amount of bathrooms whether or not theres a garage or on street off street parking also helps as well.

That seems unlikely so that is my first red flag especially considering it's a condo. 

For some reason it is in a square cut out a foot and a half deeper than anywhere else.

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!