Quality of property to purchase

[Joe Sniadowski]

Im not looking to become the next real estate mogul or set the world on fire but would just like to own a handful of properties to easily maintain and have the passive income and obviously the long term investment itself.  I live in an area where median homes go for about 240.  But right down the road, is a city area where row homes go for about $60, but quality isnt best as you can imagine.   

How much quality do you consider in your properties?  I could go for a few $100-120k single family in my immediate area and not make as much monthly but long term would be potential for much more.  Or I invest in the $60k homes down the road but just having the integrity of the home and quality of tenant could be an issue, but the monthly passive would be better with less future potential on resell.  

Anything i havent considered or other advise is much appreciated