People should hold off on going out, avoid crowds, wear protective gear when possible while out in public, wash their hands, use hand sanitizer, work from home whenever possible. 

In that time my appreciation has flourished, and the loan pay-down has given me a decent equity bump. so on paper it's pretty much a wash.

Was he letting you know that he was licensed to GROW marijuana or use it as part of a medical treatment plan?  

So a wash.

And get this, when I confronted the neighbors about it, the husband bows his head and sleeks away; the wife tells me that since there was a big rain that washed debris from my yard to hers, and I was not there to clean it up, she didn't feel obligated to honor our agreement!  

These work really well, as long as they double them:https://www.amazon.com/Washing-Machine-Lint-Snare-Fabric/dp/B00COFAY78/ref=sr_1_13?

Some charge a flat rate, and others do a %.  We

Then the cry was he couldn't afford any rent (I hadn't even mentioned an amount) because he was on disability. 

You would never expect your auto lender to come and wash the car for you.  

Most certainly not nearly as fast as it's going to wash by the tree and into your asset...and if you plant trees without real irrigation they're going to die.