I personally believe that having good partnerships can be a HUGE boost to any business when structured properly with the right people.

It's my experience if a tenant howls loud and long enough and they were reasonable good tenants, we would let items go that might be difficult to prove like switch plate, light bulbs, burner pans (surprised they're charging for that as they almost always have burn marks).One thing that stands out is they did not make the proper effort to repair the roof. 

The document can be found under "Tools" - "File Place" and a screenshot is below for ease of navigating to the proper document.

If its thru a realitor you have to go thru proper channels. make an offer that allows both inspection and financial outs. try to get them as long as possible- say 30-60 days minimum.Once you control the deal- you can do your due diligence to see if it really is a good deal.

If it is hung properly, it will last just as long as anything...metal has to be externally insulated too. 

the proper term might be wood floors. 

Along with that, you have liability issues that you can be exposed to if you don't properly hire, document, and pay contractors.  

I did already take some action by finding a cash buyer , but I need to get some info on things like how to properly figure out the repair costs, what I do step by step when I find a good deal , how to know how much I sell the contract for , etc.

For your first rental, I would stay out of the Tree streets or French Hill, if you are buying in Nashua proper. 

Some other issues as well.A second lien which survives a foreclosure would typically be from lack of proper notice and identification to be foreclosed.