From reading this it seems to me that you are letting your personal feeling get the best of you.If they are good tenants and it seems that they might be, then step back and take a look at your feelings and then measure that against the stress and loss of revenue if you have trouble in the near future.

And you’ll know how to measure the outcome of someone you pay to do it next time.

Ratio Utility Billback Systems are a great way to get tenants to pay for their water, but it doesn't need to be overly complicate with rigid measuring systems.You can create a formula yourself based on square footage, number of tenants, etc... that each unit contains and then right it into the lease that they'll be responsible for a portion of the monthly water bill as calculated through that formula.The key, and it's an important one, is that you cannot profit from billing them for utilities.That means you should take the monthly water bill, and only charge back, say 60-80%.

Buffett will take your $1m if you want to bet otherwise.The theme here is folks (myself included) whose production is measured in whole or in part by number of transactions.

At our firm, we typically request a site survey from a licensed surveyor, and as-built drawings in CAD format from an as-built measuring service. 

The CoC is a measure of what your INITIAL out-of-pocket money returns for you, not looking a changes over time. 

Although it's a vanity measure, it helped us get a lot of likes too.

You can't manage what you don't measure kind of logic. (*) Note: Always background check your PM and their people.

Does Buildium allow you to measure KPIs?

He or She will come out and take measurements, photos, etc.