Nat has an especially colorful real estate career, at least the parts she shares on BP.  

This is one of my favorite features of Bigger Pockets especially for asking specific questions.

This is one of my favorite features of Bigger Pockets especially for asking specific questions.

This is one of my favorite features of Bigger Pockets especially for asking specific questions.

This is one of my favorite features of Bigger Pockets especially for asking specific questions.

This is one of my favorite features of Bigger Pockets especially for asking specific questions.

I am interested in all areas of real estate, but my most favorite that I would love to become expert in is how to use real estate to generate cash flow (investing in buy and holds) and wholesaling since I have little to no cash to start out with.I would really like to take this opportunity to connect with other investors in the area.

This is one of my favorite features of Bigger Pockets especially for asking specific questions.

Wondering what experiences you all have had with the letters and if anyone has done split testing which ones have worked best (color envelopes, urgent, letter type, etc.)

Nothing to be ashamed of doing this strategy either, as long as you stick to your plan.Personally, my favorite REI article of all time, written by @Brandon Turner below, is how I modeled my strategy off of (thanks BT!)