DC, PG County and Baltimore are locations where that strategy will be possible, along with flipping. 

Currently I own one SFH rental in Lanham (PG County).

This is the prime example of why non-recourse, no PG, commercial notes are so important to investors. 

For larger portfolios like 10+ I would suggest interviewing atleast 3 PM companies and that search can start with googling "PG county property management companies". 

I personally haven't invested in commercial multifamily deals with my own funds yet, but a PG isn't uncommon to have in the loan terms. 

Those will be in Moco and DC, but not in PG.

Anacostia and PG County come to mind 

Is this true for all counties or does it vary by county/ city like Baltimore / Annapolis or Montgomery / PG County , and come down to local jurisdiction?

@Ann Bellamy a default for a HML in the scenario you describe would lead to a huge loss for them.now as you state maybe a unicorn.. or someone who is totally ignorant... non recourse is 40 to 50% down.You can try dohardmoney.com  they charge up front 3 to 5k with no guarantee of funding.. and with very mixed reviews  some say they got loans.. others have blown 5k and never got funded.. if you want to give up equity this could happen ... you can put 10% down with Gorilla in Eugene but they will want PG and they will want significant upside.so you cant have it both ways  lowest rates HIGHEST risk.... unless of course you simply use your own money then

If not, has anyone successfully installed a submetering system for water or gas in PG County?