Can't get enough of the medical and senior care facilities haha.One way to diversify, and move into other asset classes. 

Get a feel of what the market is demanding, a feel of dealing with sellers, negotiation skills and then scale up.

Unless you need a specialized degree (ie, law, medical, etc..)Just my $0.02.

What would lead people to believe that it is anything but a very minute possibility that one can "invest" in real estate without any money, and, even worse, without any experience or skills when it comes to real estate? 

There's lots of people  skills necessary for the buy & hold investor.

Looking for mentor to help me learn and my skill in the real estate game. longterm goal is to build a great real estate business/portfolio and get into development. 

I'm looking forward to using these skills to give an extra edge to my real estate ventures.I recently returned from France where I lived 2 years as a volunteer for my church.

Theses folks deal with protesters all the time and should be skilled at dominating the meeting. 

Most reasons have already been stated above such as: job loss, medical health issues leading to job loss, divorced spouse/domestic violence issues, allowing their adult children, boyfriends/girlfriends/former spouse  move in that are not on the lease and whose financial and rental history would fail to meet rental criteria set by you. 

In addition I am in a syndication that has several commercial, and medical dental properties.