We also had to install a commercial grade fire protection system which has 3 tanks of 3,000 gallons of water each!

Three months of this, gallons and gallons and gallons of wastewater, and that drain, believe it or not, has never clogged.What the hell?

New York Prices bla bla bla..yet we just bought a house for ... pretty much a gallon of milk (the green house)And before that we bought a house for 11K with ARV of 183K (60K in repair costs).And before that a house for 5K ARV 60KAnd before that a house for 70K with ARV=350K.I have students in Florida and Miami that are crushing it.If HE can do it... why the frogging frog can't YOU!? 

Currently, Heat and HW are paid by the landlord costs around 4500$ run with an OIL(15yrs old) based furnace and a 60 Gallon hot water tank, all rooms are equipped with baseboards.

I would make your plumber/HVAC pro guarantee the tankless water heater units will operate to a minimum standard..A hot water tank provides 80 gallons of water at X temp for 30 min....something like that has to be in the contract.

I usually spend about $40 for a five gallon bucket of $200 paint.

Utility company noticed a usage of 80,000 gallons from late October 2020 which was out closing date thru JAN 6,2021 resulting in a $2,000 bill (landlord pays utilities).

Yes ..a 40 ounce bottle of Shlitz , some mouse traps and a gallon of bed bug spray

Essentially, I would like to assign each unit a usage of "x" gallons per day before closing the water valve when threshold is met to regulate the units.

You offer a gallon of milk for $3.