Copper wiring being ripped out ($10k in damage for $200 in product), appliances stolen, HVAC units lifted, etc....Lock it down.

.--- and you'd better find out what the rules are before you lift so much as a single paint brush, because they are even going to tell you what colors you can use.

I've never had a problem with any of my tenants in my single family condos which are located in Los Angeles, but that is obviously not an apples to apples comparison.

I lifted my contingencies on a purchase of a duplex. 

If you initiate on just one a judge can easily side with the tenant and say maybe that one person was a bad apple...  

I just watched the weather channel.They had a video of Texas and a tornado was lifting and throwing cargo car boxes weighing 16,000 pounds around like feathers.They were going way in the air and very far fast.Awesome and very scary at the same time.

Apples and oranges.

My brother and I will do all of the "heavy lifting."

Your best bet would be some heavy lifting on your end sadly.

They're already getting their justice, and you don't have to lift a finger for that to happen.