:/None of that will matter in court but what do you mean by ‘enforcing’? 

The best way to learn this is by reading a Tax Court case.  

court clerk/judge ?

So even if you pick a state with stronger protections like WY or NV, the cause of action arose in the state where the tenant fell, so likely that the court where the accident happened would have jurisdiction.

(1) File FiFa with the courts(2) Find assets (car etc.) to file lien.

Talked about the US Supreme court recent ruiling.

Put a lien on the property(s) they own, this is needed by some court action (i.e. lawsuit in civil/criminal court) 

I spoke to the local fire chief.

I don't try to evict based on neighbor complaints as those aren't super reliable and the people likely won't show up to court. 

These logs regularly end up in the Tax Court and are usually destroyed upon review.