I am a BDM/Director of Ops in Property Management.

I am not sure, as a larger portfolio and our software connections the way we get paid sometimes varies. 

Some of those variables are the size of the park, number of vacant spaces, the number and type of park amenities, the age of the park, underground infrastructure age and condition, park location, size of the market, city water or well, city sewer or septic, other utility sources and whether or not they are direct billed, deferred maintenance, cost of management, and more.

Same can be said for using a property manager vs yourself or using a realtor or not.

However I read books about real estate and thought that when I come to the USA, I'll start building my real estate portfolio, so here I am.I read several real estate books in the past, but now started to explore more while I'm in the USA.

That law is usually for managing properties that aren't yours.

Deciding on a market is based on your portfolio structure, goals, and how your lifestyle can manage those assets.  

Work in Property Management with investors.

Installing effective software for simplified documentation is critical for organizing and managing the massive amount of data involved in the due diligence process.Physical property inspections and unit walkthroughs are equally crucial as financial due diligence.

Hi - I use Renters Warehouse to manage one of my single family homes in MN.