From what I understand/read, it has to be hardwired OR have a sealed 10 year battery.

That's tough, yes I would definitely look to charge rent for a business.

I more easily track all mileage, buy supplies like light bulbs, batteries, cleaning stuff, grass seed, icemelt, etc through.   

You didn't specify so I will assume you're not planning to charge rent while your children use the property. 

Should I replace the charger and move on??

As you're well aware, it is possible to live frugal and still be considered a success :)@Jeff Brower I was once that friend holding up the keys to shiny new cars, beginning with a Jeep, then a Subaru WRX, Dodge Charger, & Jeep SRT8 Grand Cherokee...from a $3k loan all the way up to $24k for cars that I no longer own.

Dragging the cord is why I said "open" - if you have a bunch of trees or swingsets or whatever to navigate, getting the cord to do the right thing gets trickier.I don't like battery electric mowers; I feel the power requirements hit the batteries too hard and will require replacement batteries too often.If you get a gas mower, again, use non-ethanol gas, as fresh as you can. 

My tenants change filters, batteries, are responsible for the first $100 of repairs. 

Depending on your personal goals, there may not be enough of a spread between what you will pay out monthly in mortgage, taxes, and utilities and what you can charge. Real

Well we were over there the other day to replace all the batteries in the smoke detectors and noticed that it had been removed...Besides being rough on the apartment, the other tenants have told me that he's yelled at them numerous times, slammed doors right before they could get to him, etc.