It's too difficult to narrow down a KPI that would attract someone.

But, in future if we want to develop any residential or commercial buildings on this land, would this rail road track going to be a deal breaker in terms of attracting potential developers or buyers or investors? 

One attractive factor for me is the recent announcement of the tallest tower planned to be build by 2030 that was recently approved with  no height restriction.

Per the article, the term "Seriously underwater" is defined as 25% or more owed above the total estimated market value of the property; Among zip codes with at least 2,000 homes with mortgages.I'll let you in BP Nation decide if this potential financial loan distress would make the Rocky Mount area more or less attractive for a real estate investor.

For example, what if you decided to paint the interior dark green, which is largely unacceptable to the tenant segment normally attracted to your property?

Quality acquisitions are attracting multiple offers. 

More often PM's will charge a lower monthly fee which looks attractive but have a bunch of "junk fees" for renewals, property inspections, maintenance mark ups, etc.If your property is in San Diego, happy to connect.

Including a flat fee for utilities on top of rent will make the rent look higher and less attractive to potential residents and potentially cost you money if there is a toilet running or water wasting.

Best and Safest Areas to Invest Near DallasWhen considering areas to invest in near Dallas, especially for house hacking, you'll want to look for neighborhoods that have strong growth potential, good schools, low crime rates, and amenities that attract renters.

The lower barrier to entry to Spain is thus attractive to me (given the right deal of course).