Lippert makes the one I put in my toy hauler. I paid about $550 plus labor to have it installed. The weak spot on mine was where the bracket attached to the floor the floor needed quite a bit of reinforcing meaning a 1/4 inch plate had to be welded to two frame members otherwise it was starting to break the chip board floor. That was three years ago and no more problems. While it is a bit slower than manually lifting it is so much easier. This unit was an option on some of the high end Fuzion 5ers and some other big toy haulers.