I buy houses in Columbia Heights - Petworth area with as many bedrooms as possible (I'll turn a living room, a dining room with an egress window, basement rec room, a heated porch, etc. into bedrooms as well.) and rent by the room.  

UmañaR&R heating & cooling was great when I had used him before.

It has central heat and air, has a metal roof, an unfinished basement that has potential to add a lot of value to the home, etc.

The heat could be put on Home Depot and perhaps you'll be able to return the dishwasher despite Home Depot claiming you breached the two day delivery return date. 

Currently, it is just an open space that I plan to heat, cool, floor, drywall, insolate, and insert piping to make it a 1 bed 1 bath studio.

Currently it is a steam boiler system that heats the entire building.

For an apartment building I bought I wanted to put in heat and air for each apartment rather than every 2 units share one HVAC unit (and I get the electric bill). 

I see it all the time where people will advertise an apartment for rent with heat and hot water included in price, but not mentioned in the description of the listing.

The seller claims that the heating and water was working fine when the tenants were evicted.

@Isaac PassmoreYeah, I'm pretty sure insurance wise, once you add that magical heating appliance (stove) into the mix in a second kitchen then it becomes a higher risk as well.