If no one likes you enough to go with you can schedule overlapping viewings.

@Steve Vaughan, It's probably not surprising that many of the names overlap - so there is at least some method behind the madness.

If you go the single family route, it could still be profitable on Airbnb because you could rent out rooms individually or as an apartment but you would need to be sure the bookies weren't overlapping.

There are not many areas where these 3 circles overlap that allow you to market to this specific group of folks that meet all 3.

It appears there are several different markets within Baltimore with depressed markets sometimes overlapping highly competitive ones.

With that being said 3 important tips: First, try to use a slightly different list or variation of a  list that most use so you aren't always overlapping with others...

It would have a bit of overlap since the sizes are typical 3-4' each. 

From there, I would build relationships and see where the greatest overlap is happening.

I'd agree with @Arn Cenedella above that there are fundamental economic drivers due to the proximity, jobs overlap, general political climate, that tie the two market together. 

So it is not uncommon to have gaps in coverage where there is no product applied, as well as too much overlap and areas that then get twice as much product as intended.