towing opinions on car dolly

I have a 4.0 Ranger and have used a tow bar to haul a Mazda Miata (about 2400 lbs). Stopping was no fun, cruising down the highway was OK. I would not want to double the weight with a trailer and a Duster. It would be a white knukle affair. Drive your car.........it gets hot in Texas, not up where your are.....LOL