Most fail to paper the contracts, indemnification and additional insured requirements correctly.

It was written before the days of YouTube, so it's not full of the common nonsense where authors sell a course, send you to their website for downloads, or write a follow-up with additional "secrets" they forgot to put in the first book.Long-Distance Real Estate Investing by David Greene was another good one.

We did a master suite addition to the property What was the outcome?

Quote from @Evan Polaski: @Jay Hinrichs, while I wasn't going to call them MLM, I did attend an Armando Montelongo (A&E's Flip this House from mid 2000's) seminar at a hotel conference room in 2007 or 08, which was the free funnel to spend $1,500 for a three day seminar or $25,000 for an in-person mentorship.I have seen similar promoted with Christina and Tarrek from Flip or Flop more recently.I didn't start realizing how profitable education can be until the last 5 or so years.  

So this might also complicate matters significantly as I would probably need to add both an additional well and an additional septic in order to truly split these into two separate properties. 

Maybe you could get your City Council members to contract with lead pipe replacement specialist contractors and just add it to your city taxes or something???

Quote from @Corinne Snyder:Hi Michael, my CPA will not allow me to claim myself as a real estate professional with my one rental single-family home rental property because I do not spend enough hours per year running it, therefore he won't allow any overhead expenses to be claimed; only expenses related to the property directly.  

The goal is to change careers to something that allows me to decide my hours (in the process of now), become a landlord, and finally spend more time with my kids and family. 

Additionally, maintaining well-organized financial records demonstrates professionalism and builds trust with potential buyers.

But this comes with additional requirements you must achieve (look up REPS).