16 trailers (with dollys) ~400tons

How to Make a Wooden Dolly for Moving Items

Wheel Dolly - Gaither Tool Co.

Hydraulic Vehicle Wheel Dolly

Rolling Wheel Dolly for Changing Car, Truck, Skid Steer, ATV, and Trailer Tires, Tire Lift for Large and Small Vehicles, 3 Roller Positions, 485 Pound Capacity

1300 lb. Capacity Self-Loading Positioning Wheel Dolly

Product Review: Park-n-Move Wheeled Motorcycle Dolly

Trailer Valet Wheel Dolly with 2,000 lb. Capacity TVWDX-2 - 2/Pack