Its not that difficult of a job providing, as others has stated, your axle already has the mounting flanges. I added electric brakes to my Aliner which did have the necessary flanges on the axle. I purchased the wheel and brake components from Northern Tool. It did require a bit shimming to get the backer plate horizontally positioned correctly to the wheel so that the magnet would properly engage the inside of the wheel.
Of course then comes the wiring on the trailer, the tow vehicle, and adding a brake controller. If you are handy with such things its just a matter of having the time to work on it.

