We have he same engine in our class A, our car trailer is 1,500lbs empty (all aluminum 18’) the car is about 3400 so we are certainly over 20,000 going down the road. The engine does pretty good at moving us along, I run no more than 65 and it does fine unless climbing a hill at which point is likes to downshift for more power. The 3010DS we had drove better than this class A so with a bit of caution and common sense you should be OK.
2020 Coachmen Mirada Select 37RB
2019 Ford Mustang
H&H Aluminum Car Hauler
Cricket RX5 Golf(?) cart