21ft trailer frame

Stripped down camper frame. Daul axle w/electric brakes. Needs a deck and to be wired with lights. Can fit a 6ft wide deck on it without extending axles. Was going to put together but got a good deal on another trailer. Looking to get 400.

Oh and the deck length is 21ft. The whole trailer is 25 somthing.

Nobody wants to make a cheap big trailer?