I have read that you have to put 20% down on the first 4 rental properties. 

(If you have invested here this would interest me too)- Last but not least: I'm trying to learn, read, and grow my real-estate network.

We point our new Bridgeport residents to this link as a summary of the code:  https://www.jud.ct.gov/Publications/hm031.pdfBecause most will never read it,  we have a basic "Rental talk" outlining each parties responsibilities.

I read his comment thinking, "man he sure is giving it to him".

I've been reading a lot about goals recently and it has me thinking, "As we grow, should our strategies and goals grow too?"

It's going to very greatly based on your exact goals.I recommend starting off by reading The Book on Rental Property Investing by @Brandon Turner.

I read The Book on Rental Property Investing by Brandon Turner and some other books.  

After reading a few books (one of them being "Rich Dad Poor Dad" ofcourse) the idea of switching to a job to learn instead of working solely for money seemed interesting.

Would be an interesting read.

Read your HUD contract - the HAP Agreement - to be sure you aren't going to violate it.