It is the large community mailbox and you usually have to pay to rekey the whole thing for security issues.

She paid the locksmith with a check that of course bounced.

I'm asked by the sheriff to be at the property at a certain time with a locksmith.

Called a locksmith and gained access.

Utilities, lawn mowing, locksmith, etc. 

Eventually got a locksmith out around 2am after one ghosted me.

It is good that you have reported this to the state which will have implications on their license.In addition, I would consider sending them specific emails (for your records) and rekeying the properties and gaining access to them. 

Even with an attributable labor rate attached to an invoice (which you have to trust a PM company to do fairly/accurately) it's still better than having them call a locksmith each time to rekey a lock or a plumber to install a garbage disposal.  

Also, how to force tenants to put in their name, so they are charged, not the ownerHow will rekeys be done between tenants?

I am not sure how to handle this - can I give them contacts of a plumber and say a locksmith and have them reach out to them and address the urgent issue.