Here are the stats from Cleveland Water and NEORSD (sewer):~$100 avg for 1.9-2.1 MCF water usage per month~$200 avg sewer costThe total of $300 per month is about 20% of the entire rent charged for the duplex which seems extremely high for just water and sewer (and frankly, way out of what I budged for when purchasing the property).I'm able to see daily breakdowns and each day seems to be about 400 gallons used a day for the duplex.

That gives you gallons per minute. 

The calculator I used had an electric rate at 15 cents/kilowatt-hour and oil at $2.21/gallon.)

In my current system I am spending $60 to use ZERO gallons of water and have the bill in my name for 2-3 weeks (water, sewer and trash are on same bill, plus random service fees). 

It includes both gallons used and cost.  

It is a 500 gallon tank that was most likely used primarily for the shop in the past.

Think of it as putting a small amount of poison in a gallon of ice tea.

I've raked up a backyard and filled up 4 full sized 50 gallon trash bags of poop after a tenant only being there 1 year (so yeah, I've seen some sh**,  pun intended).The dog isn't necessarily a deal breaker, but you should for sure get a decent sized non-refundable pet fee up front, plus an extra monthly fee that will cover the renovations to put the place back together when they leave. 

Never charge the resident more per gallon that you are being charged.

We filled a 5 gallon bucket one time from water dripping.