Why would you choose to supplement your tenants rent.

Someone who knows how to market and promote themselves may NOT have a clue about real estate. 

You are promoting products out on the internet. 

I don't need a huge passive income currently, but I do hope to build up my portfolio in the years to come to increase my net worth and maybe have supplemental income down the road. 

The site has been heavily promoting the subject-to gurus for a while now.

We have to make sure that the operator has strong supplemental STR liability insurance EVERY YEAR.From an operator perspective:You don't own anything (except the furniture).

I am not taking that as self promotion, I see it as you showing me an answer to my question.

It's never enough for the people who promote these sort of ideas. 

The hard work is finding the funds and vetting the promoters.

I see this as  huge risk .I am with Mike if you were buying A and B class I could see how this would have a chance, my fear is you end up like every other promoter who tried to make C class work and broke there pic doing so.now you have a bunch of investors who own homes that most likely can't be sold for what you have in them without the help of a highly organized turn key type sales and marketing effort..