Possible a designate smoking spot for the tenants that smoke.

In general you cannot discriminate against families, but it is - or at least was - possible to have a building designated as adults only.  

As to ratio analysis, some approaches to an asset portfolio may apply, such as the quick asset test or maturity distribution, but they are not adaptable to real estate as they were designed to measure performance of a liquid asset, real estate is not, the approach to asset management is different in maintaining and improving and revitalization of long term assets. 

If you can isolate where it is concentrated, a few sheets of plywood will fix you right up for not much money.

We're going to physically go in 5 properties (two with our contractor, one with a designer) as well as a bunch of other properties/projects we've completed. 

There has been much research on Crime Prevention Through Environmental Design and the benefits of community working together!

I usually throw everything on the floor out, soak the place with quality enzymes designed for pet urine, and clean everything thoroughly. 

I wonder if you could claim improper service because they served the designated agent on the form instead of the agent prescribed in state law.

I plan to start there and add to my design arsenal as I build more.

These would be more aesthetically pleasing and be designed for your problem.