I completely remodeled my own home after the flooding (28K gallons into house).

Water/sewer sent water usage and it was 2 to 3,000 gallons used every day for the month of April.  

Is that a metal lid from a 5 gallon pail I see on the top?

TLDR, it's like a 5 gallon paint bucket filled with money.

Go into Home Depot and see what a gallon of paint sells for. 

Thirty years ago, it cost me $600 in labor and parts to replace a 50-gallon hot water tank, currently $1,500 and often they only last 6 to 8 years. 

One property with propane pool heat and just a gas fire place I used 1,150 gallons last year (x $3.29 a gallon).Do you have a large area needing grass cut or small area?

Typically they are sized by the gallons of water you use, and you are permitted by that size. 

If I bought something for a specific reason on one of the units I put those materials toward that one where possible even if it could be argued that it was a general expense (like buying 5 gallons of paint for one project and using 2 gallons left over to paint a single room later at another property). 

Well, at $0.05 per mile, a gallon of gas should be $0.85 to $1.15 to match what I pay in the EV MGP-equivalent.