I mounted my generator on the back of my 19' on a heavily modified rear bumper to handle the weight of 2 additional batteries and the generator. After re-distributing the weight front-to-back in the trailer, this has been a great solution. The generator is secured with a special mounting plate and locking pin in the hitch. I believe the rear bumper modifications were less than $300 including design, materials and fabrication. The commercial generator mounting plate was additional.