Would you just suggest showing up at his place of business if this continues?

Since then I've read, and continue to read, numerous real estate and self-development books. 

I wish him good luck and respect him for what he did here and what he will continue to do even after he leaves.

If you plan to continue investing then the strategy should entail to use OPM (Other People Money).

They update constantly with new features that can do more and once you get it set up to your liking everything is automated. 

I want to continue to do rentals and also get into flips as well.

Otherwise, these tenants will continue to abuse landlords.

Continually rising student debt perhaps?

I got out a few years ago and continued with my education and I am currently attending college at the University of Hawaii and will graduate in December this year with a Business Management degree.

I’m also going to add a list of 400 new motivated sellers every month to continue to contact monthly & build my leads up.