Your appraiser should be able to compare your house at 2 bedrooms with the one down the street at 3 bedrooms.

I'm also in contact with Probate attorneys; and other attorneys who are interested in my ability to hit the street, and get dirt underneath my fingernails.  

The house right across the street was just purchsed for $75,000.00.Is this an opportunity for an investment property that can save my parents from having to move? 

I drove that street for that deal you are talking about and it is a horribly bad area, probably top 5 worst in the city that I've seen.

You are right down the street from me here let me know if you want to grab some Great Bar B Q if you are ever in town!!

Example: 123 Carter street is a triplex on Zillow.com. 

The building would need to be demolished of course.The lot is on a street with only SFH and one block away from the business area of the neighborhood.

Similar duplexes on this same street rent between $600-675 a month.

I am looking into buying a duplex in a strong rental market in a great location but there is a new multifamily development that is scheduled to start construction later this year on the property right behind the duplex (line of trees behind to separate but traffic would go through street in front) .

Network with investors that are local to you to expedite your search or start beating the street and knocking on doors until you find the right people to work with.