Turn off water to each unit and see if the water meter continues to run. 

I’m still young and plan on continuing to put all my money in real estate for the next 10-15 years.

It’s more like having a continuous, flexible funding option rather than a one-time transaction.It doesn’t require much effort compared to getting a loan traditionally:When you "get a loan," you typically have to go through banks or rely on friends and family.

In Miami, i have my family and also have great opportunities to build a career there from my parents relationships.Now, im not sure if when i graduate, go to Miami where my family is and start from scratch or if i should stay here in boston and continue building relationships to be much ahead when i graduate.What do you guys think?

Th iincome needs to be reported on credit, has to have been received for 12 months and likely to continue for the next 3 years in order to count as income. 

Seems like a liability as long as you continue to own this property.  

So most agents are only putting about half of that $12k in their pocket, and out of that $6k they have to cover all of their operating expenses: licensing fees, MLS/ Realtor Association fees, continuing education classes to stay compliant with licensing requirements, monthly "desk" fees/ technology fees to their brokerage, health insurance for themselves and their family, errors and omissions insurance (required), marketing, car, car insurance, gas, clothes, computer/ software, cell phone, closing gifts, signs, photography, staging if they offer that, etc.

Either way, i always decide to buy additional properties as opposed to developing what i have, because I’ll continue having that and can do what i please in the future. 

I will continue to search for off-market deals. 

They are still at a discount to the 10 year treasury bond (i.e. market trends indicate they will continue to escalate).