I used to use a PO box but it sat collecting dust for years so I don't bother anymore...I've had people find my personal residence by looking me up on the online tax records. 

The drawback I have is that it is difficult to pounce on properties that are still selling relatively quickly with the commitments I have  to my patients in my dental practice.  

More people are doing residential real estate nowadays due to online education, social media promotion and community like BP and deals are harder and harder to come by. 

Online real estate sites such as Trulia, Zillow, Redfin, Realtor.com, and LoopNet.

There is absolutely nothing he shared that you can't find online or here on BP.

With its inviting curb appeal and well-maintained landscaping, 17 Penny Lane stands as a testament to both style and practicality.

Now I still feel interconnection is hard to estimate as investor even some of these information are available online and this is the biggest risk I am taking here.

Chapter 11, "Hone Your Skills" section has this practice question: "What is the IRR of an investment that costs $75,000 up front, earns you $22,000 per year for four years, and then generates $115,000 at sale?"

Check out other online guides available here: https://www.biggerpockets.com/guides3.

Also @Jayhinrichs the tax sales here are done online now.