Have 4 trailers from 14 ft tandem axle 7000 LBS to 56 ft 21,000lbs car hauler including an enclosed 30 ft 10,000 lbs.My trucks are a 2000 F 350 Banks/and a 2000 F450.My experience is about 7 years of towing trailers all accross the US.I have towed anything from empty barrels to a 30 ft speedboat which belonged to NBA star Jason Kidd. If necessary I have 2 co-drivers which both have CDL.Most of our shipping gets done over the weekend , sometimes longer hauls get done whenever necessary.