The usage of the two machines matched 100%.I just emptied out month 2's bins, and found that the coins in the washer represented only 1/10 of the usage of what was found in the dryer. 

I will be renting ADU fulltime and will not use for personal usage.

I try not to let it get personal...there are some members that have been 'inappropriate' in the past, but I will still give them a vote if their post actually deserves it

Those leases are never renewed due to the high usage cost. $800 electric bill for 800 sqft place is not uncommon.

There are days with normal water usage, and the days that are weird are all about the same. 

Set a utility usage cap that is stated and agreed to in your lease agreement.

I find that internet providers, like Comcast, tend to update their technology and offerings to better speeds as customers have higher usage demands.

I still need a way to track each tenant’s water usage, so I’m considering the Moen Flo Smart Water Monitor.

My suggestion would be to cap your utilities at a certain amount and have Tenants pay anything over that amount.That will help you manage your expenses, and also allow Tenants to gage their usage each month, and make adjustments if they don't want to go over the allotted amount.As far as collection, provide the bill showing any overages and just have them pay for it along with their rent. 

After 2 years I have had to replace very few items, whether that be from theft, loss, or over usage.