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

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.

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. 

I am considering putting my 1969 Charger up for trade on the right multi property in my area, I paid 25k for this car a few months ago and now the value has doubled, it's a General Lee, what, if any, taxes would I have to pay if I did a straight trade on a property?

The residents of the area do not make enough money to charge rents approaching the mortgage and carrying costs of a middle to upper middle class home.  

But they charge really high interest rates.

After 8 years of working at various title companies, I opened Charger Title Insurance Agency, Inc.

I know no PM that would charger a late fee for rent due on the first and received on the 3rd.