The community is built around applying the techniques and practices taught through an online streaming education platform. 

That could be a buy and hold strategy where you are banking on enough positive cash flow or passive income from enough units, never paying anything off and leveraging one property to the next.However, my thoretical strategy goes more like, maybe a 15-20 year strategy of buying, say only 10-20 SFR total (average value $250k w/ $2500 a month rent, each), fully paying them off, either with 15 year loans or paying off 30 year loans early, at which point, would just be collecting the full rents (minus taxes, PM, etc) as an income stream/passive income and "retiring" from the rat race.

I'm very interested in learning more about real estate investing as a stream of income as well as an asset builder.

I think this is a vastly under-appreciated monthly income stream that real estate generates.

@Jai Coward when I lived in Memphis I had a continual stream of people trying to get me to help them get rich.

It will just become more bureaucracy that does not meet its intended purpose and likely turn into another revenue stream for local governments.

The cash flow and appreciation down the road (if bought right) is significant, and any other investment type will charge you taxes too, so might as well take the option with the most income streams (rental properties).

And since you'll have 20 income streams you can replenish it faster than with a single property.  

Have the tenants pay the mortgage and create a stream of income for retirement? 

I hope it piques their curiosity to pursue RE investing and diversify their income streams to weather the storm of any future recession/job loss in the future.