Since this will be my first REI attempt, I wanted to keep it relatively simple to gain some practical experience.

I am not sure if this is a solid do not or if it is not best practice.

The common practice today is to tear out old windows because they are "bad".

They no longer do so if I want to sue I must file a federal lawsuit and the attorney was hoping I would to stop the practice of defrauding the public!

It is common practice to introduce your own rental agreement/lease as soon as possible when purchasing property with tenants in place, and it is also important to introduce yourself right away, both formally in a letter and in person (yourself or your property manager).

I know 3 ways to wholesale without entering into contracts in bad faith, lying to owners, deceiving and getting into the practice of real estate without a license, which is basically what this whole crowd is following. 

This seems to be typical practice within the South Jersey area.  

Landlords with long term tenants often fall into poor management practices.

You might also need some practicing your estimating skills before you start making real offers.  

Practice until you can spot them with some basic knapkin math, then watch the MLS constantly, talk to other investors, tell everyone you know exactly what you are looking for, drive for dollars, etc.