Also, there is a good chance, my fiance and I won't be living in DC in a few years since both of our jobs are taking us abroad.

It may be a waste of time contacting them all and find out who owned it but in my case when I did the cold call, I still contact those numbers even if it's 90% chance that it's a wrong number so I can have the chance to tell them if they have homes they need to sell, I received some people responding to me wrong numbers, and I create this quick text for wrong numbers, and some replies to me that they have property to sell soon or they know someone like a relative or in laws that needs to sell.

You do have a better chance of finding desired experience among the licensed professionals, but being licensed guarantees nothing.

Chances are that it is of an age where any alterations you make to the property will force you to upgrade it.

IMO, cash flow is a good way to invest in real estate because in the long term the property has a chance to appreciate, but we are not counting on that, but during the time you own the property you will be able to collect a 'dividend'.  

Then maybe you will have a 2% chance of changing the zoning.

There is a chance that the $120k house was a true outlier.

In the off-chance you ever get sued, an attorney would have a field day with your commingling of funds.

In other words, there is no chance your monthly mortgage payment is $329.

I would like to have your reference when you get a chance.