They ain’t blue, they’re purple. 

If you want to stick to the DC/MD/VA area, you might want to consider house hacking a SFH and Airbnbing an extra level/room/basement/crawlspace/fallout shelter-- like you said multis are few and far between here, but you might be able to find some in areas that show up as that beautiful deep navy blue on the Trulia crime map.I live in northern VA but do all my investing outside the area. 

Classic case of a city that once manufactured one or more products and had a strong blue collar influence, but now is mainly low income service jobs.  

Hi all, I remember listening to a biggerpockets podcast (the subject was wholesaling) where the guest mentioned a "blue book" that he had developed that was like a script for his employees to follow when speaking with a seller or buyer in regards to owner financing.

I wonder if it will bring mainly 'blue collar' jobs to the area.

Once in a blue moon you read about a deal dying because no one thinks about this, but that's only because everyone completely ignored it, rather than thinking about it upfront like you are here. 

Home prices are going up around here but there are still plenty of blue collar/working class neighborhoods.

Im trading 2 condos on a golf course ($185K equity) for 4 blue collar homes; heres why;$445 HOA means im converting -$55 cash flow on 300K condo balues for $860 cash flow on 560K value of the 4.

So, I know everyone has seen the Blue dots all over Zillow when you are looking at properties.

That is if you thought this area was a good Blue Collar C or B class area by what the agent told you.Swanny