Here is a powerful machine capable of moving your trailer without you having to break a sweat. The Trailer Valet RVR is a self-motorized remote controlled machine with a battery that lasts up to 30 minutes. It can move your trailer in tight spaces and handle up to 9000lbs of weight (depending on the model you pick up).
The RVR comes with up to 4 planetary gear motors to move single and dual axle trailers. It can go over asphalt, gravel, grass, and dirt thanks to its heavy-duty caterpillar treads.