A 6x14ft trailer prob weights in about 1,200lbs and will prob hold 3 500-600lb quads. Your really looking at more like 2,700lb for trailer weight alone. Then you have to factor in the fact that in the truck you will most likely have 3 people and 3 peoples worth of gear. I think your asking far to much out of the vehicle brake system..just to save $300-400 on a trailer with brakes. Most full sized trucks come with brake controllers now.
I have a 6x12ft that I put a 3,500lb axle under with 15in wheels and electric brakes. It's a joy to tow even over my 18ft car trailer with dual brakes.
I have a 6x12ft that I put a 3,500lb axle under with 15in wheels and electric brakes. It's a joy to tow even over my 18ft car trailer with dual brakes.