Being a nutrition and fitness coach, your point below is the largest component that I have seen. 

As a negative, it also has the largest gap between the cost to buy versus the cost to rent, making cash flow extremely difficult without committing more equity up front.

This would be the least passive but potentially the largest upside. 

From a mom and pop with one home to the largest corporation in the country with the same brush. 

As an experiment I invested $30k each in the 10 REITs which had (according to average estimate of NAV) the largest discounts from net asset value as per market price).

with millions of hosts, if you are in a bigger market, there is only a few spots that can be on the first page. 99.99% of hosts will not be on the first page. so making sure you have the most exposure to the most possible guests is the aim. just like a company making a tv commercial to be exposed to the largest audience possible.sorry, i dont think your post is controversial, its just wrong. 

In our largest listing, we have a triplex with a total of 11 beds and 10 baths with each bedroom set up to be potentially rented by the room (electronic lock on each bedroom door, and most with a private bathroom).

As the 3rd largest MSA in the country it's hard to generalize the Chicago market as it's actually over 100 different submarkets when counting the 78 communities in Chicago property and then adding in the various suburbs, including in and around Naperville. 

The largest site is about 1/2 way through building a second phase the size of the first phase.All within 10 miles of the power plant.In Commercial or industrial development, you would need both the track record of success and also the financing.  

Note it often is not a result of significant NOI change (excluding some markets where a lot of new units have been added). 3 recent studies show it is cheaper to rent than own in virtually all of the largest US markets.