Can you pay off a higher interest/lower balance note first eliminating a payment.If growth is your goal then it doesn't make sense to pay down any mortgage that is cash flowing unless the local market suggests this might change.

Call the local municipality where your rental property is located and ask if they have a list of certified local contractors or see the attached link for a list of NJ Certified Lead Evaluators...https://www.nj.gov/dca/divisions/codes/publications/pdf_lead...

What does any of the above have to do with local Brooklyn Landlords/Property-managers banding together to collectively hire a roaming part-time Super to help out?

College towns naturally attract students who may become applicants for your rentals anyway.

You will benefit yourself far more in the long run by networking locally and finding a seasoned real estate agent/broker that specializes in working with investors, both building and liquidating portfolios. 

Now that you own THAT building, at THAT location, it might be time to do the "networking fluff" associated with being a "pillar of the local community." 

Ask local law enforcement who the trouble makers are. 

The Deal Finder is constantly on the hunt for new deals, always looking for properties that meet the team's investment criteria.Key Traits:- Optimistic and energetic- Risk-tolerant - Forward-thinking- Well-connected in the local real estate market2.

Building Codes and Permits: Insights on navigating local building codes and securing permits for this type of conversion would be incredibly helpful.Potential Pitfalls: Are there any common issues or unforeseen challenges I should be aware of when undertaking a project like this?

go to the local FB forums and attend local RE meetings.