What I do is sober living, which is a bit similar in nature.

You need to add some art or photos that depicts the local nature, local mountains, or something special regionally. 

What methods did you use to acquire them? 

Snowball -     Where if I were to payoff a single home with this "extra" money it would increase my cashflow by 8500/yr (but I also lose bank principle pay of 2000/year) so the effective added cash flow is ~6500yr.By the time I add Principal paydown and "slight" appreciation the add homes method seems to be the clear choice.        *** I would love to hear your comments on a debate in favor of the snowball.**** At some point, future, I think I will want most all properties paid off so I can have great flow with minimal stress and maintenance numbers but kinda feel growth phase is still smartest as of now. 

I have used this method for many years each with no less that $10k per house.

While we were unsuccessful with wholesaling, we learned a lot and had aspirations of building a RE portfolio based on the BRRR method.

What are your most productive methods of getting tenants?

There is not one method to doing this and it mostly depends on how much paperwork you want to do.

But we're exposed to it all the time, it's a mineral naturally in the environment.  

Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice.