My question is what do you think the best route would be to get rid of the disruptive tenants?  

If the unit is occupied and we need to disrupt the tenant to show it, we require a partial pre-screen.  

It didn't disrupt my business, it didn't cost me any more other than a bit more time which I took from my non-productive time.

I also let them know that they are disrupting our business and causing themselves to stand out as a bad customer/tenant.

She needs to deal with the people staying in her apartment disrupting everyone, whether they're her kid and his friends or not. 

Updating attracts the best qualified and usually least disruptive tenants.  

The idea is that one pane of glass is a different thickness as the other... thus disrupting sound waves.  

Second, I would not want to disrupt my tenants monthly budgeting habits, by taking advance payment now and evict next year, because they got out oft the habit of budgeting for rent each moth.

My tenant has been there for approximately 2 months, and the upstairs tenants have been increasing disruptive and hostile to my tenant.

Your only concern is the behavior which is disrupted to other tenants/neighbors and not in keeping with the legal mandate that tenants have the right to the peaceful use of the property.