Hello,Little background I’ve been buying and selling since for 15 years.

:) Well, if the planes take off and land from east to west, buying a home that is north or south is not directly in the flight path. 

Am I overall lowering my expenses if I buy a two-flat and rent out one unit?   

What I find to be most valuable: Ease of use, cost-savings and efficiency and here's what I mean: If using an interior designer to furnish your rental, they will hand you a list of supplies + furniture to buy and what I was able to do with Minoan is upload that list as a CSV file and then they come back with a quote of all of the items they can fulfill along with their respective discount. 

Not sure about MTRs.My general conclusion was that it is tough to do business in the town if your goal is to buy property as pure rentals out the gates and no intention to occupy.

They put on a good show, but don't buy in.

So depending on what your investment goals are and what type of properties (Class A through C/D) and where in the city you want to buy, that can directly impact the level of stability one can find within the market here. 

If you want an ADU, buy a property with an adu.  

Investment Info:Condo buy & hold investment in Ashburn.

@Erick Pena please understand that buying rentals is NOT passive income!