Prior to one of the hurricanes, my f-i-l pulled his boat to put it in his back yard. The only way he could get to his back yard was via his neighbors driveway. He pulled into the driveway and the trailer split in two. I called around and was able to get 4 hydraulic jacks capable of lifting his boat and 2 15' 6x6es. Had to lift the boat umpteen times, chalk it with blocks of wood, move the jacks, relift and so on and so on until we got the broke trailer out, then reversed the process to put the new trailer under the boat. I was the one under the boat repositioning the jacks on every move, never been so scared in my life. It was an eight hour process but we got it done. Finally got on my f-i-l's good side