Most PMs concentrate on marketing, and at least somewhat neglect operations.  

They want them all jammed in large apartment complexes, run by large companies, in concentrated areas, away from them.

If it would concentrate on rent collection only and do it well, it might be okay. 

This could allow you to concentrate your equity in one purchase by doing it in cash.

Your equity is concentrated and not costing you anything.2.

The hearing still took 30 minutes and he wanted to really concentrate on the accidental water charge, that we refunded and wanted to go into the math discrepancies, which amounted to about 40 dollars.  

To scale successfully you have to get past the point where your newly increased expenditures exceed your increased revenue; past the point where your ROI allows you to “break even” on your investment, and past the point where the ROI is worth the increased risk, the increased aggravation, time, and “lifestyle” change, and past the point where you can step back from “operations” and concentrate on management.  

I would like to concentrate on OTC liens and deed.

Quote from @Jamie Banks: @Jesus Jimenez Right now we are concentrated in the major cities from NY to Richmond, VA including NYC, Newark, NJ, Philadelphia, PA, etc.

For flipping, I'm concentrating on SC and IN.