I want to get a power trailer dolly to make it easier getting my boat down the side of the house to and from the boat shelter which is in the back yard. The overall length of my truck and boat trailer is 45'. Even with the hitch on the front of the truck, I have to be extremely careful. If it were straight in and out it would not be difficult, but that is not the case. In a couple of spots I have about 2” clearance on each side. I have found 3 companies (Powercaster. Parkit 360, Powermover) that sell these units, but they are not exactly cheap. Anyone have one of these units? Any constructive comments , thoughts and suggestions will be appreciated.