Congratulations! I think that you will like the Fusion. My daughter-in-law has a 2009 Fusion SEL with the 2.5L engine and now has over 120,000 miles on the car. She has had VERY few problems with the car - - just normal replacement items like tires and battery.
As far as a dolly is concerned, I had one over 20 years ago and didn't replace it after it was stolen out of my back yard. I had disliked it so much that my friends jokingly told me I probably paid someone to steal it so that I could buy a Remco transmission lube pump and tow my Ford Escort 4 wheels down. I did outfit the car with a tow bar and the Remco pump - - but I didn't pay anyone to steal the tow dolly!
Doug
2006 Jayco Greyhawk Model 27DS
Towing 2019 Ford Fusion Energi with Brake Buddy