I just turned over a few months ago one of my single families in Silver Spring and was able to raise the rent by $200 a month.It's one of the factors you see in low cap rates in certain cities like DC, Boston, Seattle etc.

as you know....And it used to be a lot easier also.We used to be able to go to the Dept. of Transportation and get a copy of drivers licenses, which of course have addresses, as well as DOB.We even got non-driving ids from the DOT.We used to get new postal addresses from the PO for $1 each.We used to get birth and death certificates from the Bureau of Vital Statistics.We used to be able to get letters to prisoners.We used to be able to inquire if a senior citizen was a resident of a specific nursing/retirement home"USED TO" is the key phrase.

My wife and I live north of Boston and have been looking into investing in short term rentals in New Hampshire.  

Dave,I just finished building a 2 unit investment property in Boston in September 2015. 

In Boston, it's very a high rental market but you cannot expect all the properties to pan out the same.

In a walkup in you will probably be fine, but then the issue will be finding a unit close enough to transportation and in a desirable area where the rents will be high enough.

I bought a property last year within 10 minutes of Boston, Mass.

Here's my current situation: My primary residence is located in an affluent Boston suburb, with a valuation around $850k and a mortgage of $160k.

I visited it and also, no disrespect, but it didn't hold up to the "Millennial test"- there was a real lack of bike lanes and easy of transportation. 

Department of Transportation's (USDOT) first-ever Smart City Challenge, Columbus was awarded $50 million in grant funding and leveraged that into $500 million of funding.