Well, you're going to hit a point where the perspective tenants will just rent the house down the street that is on the market for about the same rent as every other vacant house in the neighborhood.

I am not familiar with this one but I would probably want to talk to some of their current and/or previous clients/students for their perspective. 

Absolutely, Joel Owens.From his perspective, it's not unreasonable to ask people to do *something* so they show they're committed - it's a big investment from the mentor side to spin someone up

From a selfish standpoint it works out well for me if people do this because they have less ability to compete with me for houses, but from a moral perspective I would not tell anyone to do this unless their cash flow was very close to the job, they had diversification, and no or little debt.

There are a bunch of real estate investor groups in this area that might be beneficial to you from both the educational and networking perspectives.

This is Colorado's only HOA periodical presenting HOA issues from the home owner's perspective.

Small Business Administration website (https://www.sba.gov/category/navigation-structure/starting-managing-business/starting-business )"21 Things I Wish My Broker Had Told Me" by Frank Cook (Dearborn Real Estate Education 2007).These will all give you some perspective on what you need to know to be successful as an agent. 

They were very helpful and put a lot of perspective into my eyes.

It's refreshing that you have a broader perspective than "milking" your properties.  

You seem like a person who is just starting out in real estate and hence, if you have a long term perspective, willing to relocate, I don't think you will go wrong in any of the cities you mention above.