Stop all communication with them, block their number, and move on.

AL will be my next stop.

I stopped using carpets in my rentals a long time ago.

Stop hanging out with your deadbeat buddies who spend all day drinking, talking sports, and otherwise wasting away.

When the tenant knows that you know the activity usually stops

Not sure how the lawsuits arrived at this outcome, but either a certain % of buyer broker fees become an expected term, which list prices will reflect, or they solve the issue outside of the offer, like it becomes commonly added to the loan amount, so list prices eventually stop reflecting it.

If this tenant is as bad as you say they are, they won't stop there.

I’ve heard many success stories from co-investors who’ve ventured into this market over the past few years.

There is no wrong way to do this unless you aren't doing it at all OR you're harrassing peopleIf you find yourself attending a bunch of educational webinars, watching too many tutorial/training videos, or anything other than those 2 things, take some time to stop and reflect. 

He argues that before pursuing any business venture or expansion, one must prioritize the cultivation of genuine connections with others.