Here are a few I recommend: "Rich Dad, Poor Dad" by Roberto Kiyosaki; "Set for Life" by Scott Trench; "The Unofficial Guide to Real Estate Investing" by Spencer; "The BiggerPockets Ultimate Beginners Guide" found here on BP; "The Book on Rental Property Investing" by Brandon Tuner.

Also, no one likes ultimatums, but you also have to avoid setting precedence.

Often you will need to live in the home for a year or two before renting, have leases a minimum of 12 months, and sometimes there are limits on the number of rentals. 

I need to set up a business checking account for a Single member LLC.

Nor will a title company provide a complete loan package.Your friend needs a lending attorney to prepare a set of loan documents.

Be sure to set up some Keyword Alerts with keywords that you want to be kept in the loop about - such as Albuquerque, New Mexico, or "Single Family" - so you'll be emailed when those terms are discussed on the forums!

If you limit yourself to a zip code or two I do not see you doing consistent flips.

I reached out to realtors in my target area, & they set me to receive emails when multi-family homes in my target price show up on the market. 

Most have only access to limited inventory, they don't have the same fiduciary duty and you have to make sure you don't get taken advantage of.

All the big wins on social media and the podcasts certainly set an unrealistic expectation.