I ordered an 18ft 7K car trailer yesterday. It is 16ft. flat with a 2ft. dovetail. 4 wheel brakes. Hide away ramps. There is a local trailer manufacturer near my house, so he is building it custom. He said it should take about a week. His normal car trailers are built using angle iron, which creates a lip around the deck. I am having him use c-channel to make the deck flush with the edge of the trailer, so if I end up needing to haul something wider then the deck, I won't have tires riding on the 2" lip.