History will tell you they don’t but you be the judge on that.As for the remote locations you mention, why would I as an American in the prime of my working years go live away from a hotspot economic area and that too in a different country.

I as the owner would allow her to pick another roommate if she wishes to.

I, as a Realtor, call you. 

I never I. a million years thought that they charge percentage fee for leases.

The important distinction here is -- just because I, as a layman, didn't notice something was out of code, doesn't mean it's no longer a code violation.

I think a lot of my tenants believe I'm maintenance man, as I'm always there cleaning windows and vacuuming and doing yardwork making repairs.

What can I as the Land Lord legally do about this?

I as a potential buyer would also be tallying in the costs and work of regrading and tree removal.

My suspicions were elevated when I " a friend of mine" happened to see some mail addressed to the sister being delivered to the unit in question.I stopped the sister one day and asked her point blank if she was living there now, and she said "no", that she was coming over to "hang out" and check on the place because her sister was staying with her BF.  

I do appreciate a call if there i a police presence on the property but I try put the annoyance issues back between  neighbors.