Learned to add more time for moving the electrically meter.

The different strategies that I've heard other property owners use are: RUBS, submetering, metering, or increasing the rent by a certain amount to cover the water bill.

If you can separate them and potentially buy your own meter you can save big bucks and it will solve the problem.

Zillow says $5600 per month, Redfin says $5000 per month, Rent-O-Meter says $4100 - $4500 per month.

We have recently split the PLP meter so that the tenant would be responsible for there own utilities ( gas & elec) just like the other 2 tenants. #1 Can a tenant have all these programs making payments on their behalf?

Exceptions are when they cannot be put in the tenants' name (I have that for a few of mine, I get the bill, and the tenants pay me that amount) or if you have two units on the same meter so you don't know how much each unit uses.

Does each unit have a separate gas and electric meter? 

They had no clue why and found out through their neighbor that the utility water meter was leaking.

I’d rather trust a professional with a moisture meter to see if it’s dry (just after or even during a heavy rain would make me feel better) before fixing the ceiling.

@Levi Perl great point by @Gregory Schwartz.We'd add one thing to his suggestion though, check out comparable rents on Zillow, Rent-O-Meter and at least one other source.