I picked up a 550 Generac. I only paid $700 for the Generator and the wiring for the remote start / stop and hour meter. The guy that had it put it in a regular Fifth Wheel. He had a neat setup for the fuel tank. It was recessed into the floor of the pass thru. It was still installed when I got there so I was able to see it run with a load. Another plus was it only had 100 hours on it and the owner had already changed the Oil and Filler.
I took my TH'er to Bike Week in Daytona this year. There were no hook up and the generator came in handy. I was sitting under the awning when my wife called. She was shocked when I told her that the Gen was running. The only place where it is a little loud is in the Master Bedroom.
I would recommend this Generator or anyone.