It's extremely rare that two applicants are equal.

Asking for a friend: I have an extremely obnoxious neighbor above me.

They were just extremely efficient in a geographic location where the cost of labor and the cost of living is substantially lower. 

I bought the property and invested a little bit of money in it for personal gains, life happened I sold said property and it was then, I realized the ease and extreme excitement I felt buying and selling real estate.

You cannot set limits on thermostats, water usage, etc., nor can you charge a differential above a set amount.  

I would approach the tenant extremely professionally and be upfront with them about the situation and give them a chance to explain what happened.

But unit A tenants (currently vacant) will have to pay for the water usage of that bathroom. 

Hi @Mateen Qureshi and welcome to the forums, being a buy and hold investor in DC can be profitable but you may run into cash flow issues as the DC market is extremely tight.

Idea was to secure favorable mortgage before rising rates while also leveraging extremely competitive rental market.What made you interested in investing in this type of deal?

I would like to buy a multi family home It’s extremely rare to find multi family in the suburbs, there’s a lot of multi family in the city, two big things to be aware of is to make sure it’s actually zoned multi family because I cannot tell you many listings claim to be multi family when they are not in fact zoned for multi and to make sure you or your agent really understands Baltimore at a granular level because it can be extremely block to block especially in the areas that have a lot of multi family’s.