The major flaw with the second article (aside from assuming appreciation, which the author addresses in the comments and being region locked) is how to grow investment operations when these deals are virtually non-existent in the investor's home town (again, the author addresses this in the comments).  

Tampering with a HUD property with out the proper authorization from the Field Service Manger can be considered a federal crime

Just make sure you get something in writing from someone with the authority at that park to allow you to do that.  

His demeanor tells me is either a retired attorney or official.

Simply Google your "county name" clerk of court official records search.  

My official answer: I do not know Florida probate laws. 

I am in the process as we speak (or type) of buying my first official rental property here in the Greater Springfield MA area. 

So the lease agreement that the realtors use seems better but it looks like I cannot use it because it has the following text on top of the form:"USE OF THIS FORM BY PERSONS WHO ARE NOT MEMBERS OF THE TEXAS ASSOCIATION OF REALTORS® IS NOT AUTHORIZED"I fired my property management company who was also a realtor shop.

I believe the author experienced harsh consequences of the 2008 crash as he was investing in Detroit but it does not imply that the information in the book is not helpful.  

Brokers and Sales Representatives are both Agents, but Brokera can do some things which a Sales Representative cannot, such as be the final authority in a Brokerage.