Sidewall contruction

Has anyone ever contructed the sidewalls completed before permanently mounting them to the trailer floor. When I say completed I mean wired, insulated, finished inside and outsidewall attached. I've never built one yet, but this site got me
My thought is to build the 2 sides, front wall, galley wall and roof on the woodbench in the basement. Finish it and assemble in the driveway it the spring
