The answer to number 2 is experience.  

hard money lender and 6-7% a year money cost is not the right answer. 

When I try to figure out the "Internal Rate of Return, Before Tax", however, my answers are WAY off.Would someone who has read this book PLEASE help me understand how Mr.

By tax card I assume you mean tax appraisal and the answer would be the only thing you should really look at is the tax rate, any special assessments, the recorded owner, and if the appraisal is too high and in need of an appeal.  

To answer your question:1.

If you can’t answer just don’t comment.

Wish I had a cleaner answer, but everyone is going to want you to have skin in the game. 

There are many agents out there, but it’s important to choose the right one.https://www.biggerpockets.com/blogs/5868/52724-im-new-to-investing-how-do-i-find-an-investor-friendly-agentI love answering questions if you have any!

I also when its someone new .. will google street view.. get the person answering the phone to describe what her office location looks like  or I will say hey is that a McDonalds across the street from you when I know its a burger king.. then the other thing I will do is make them recite some information on the hud that a scammer would not have access to.you simply cant be too careful.. millions of dollars a day are being lost in this manner. 

Your answer is very helpful.