I did it with a 24ft but it was an enclosed car trailer. It was really rotted out and built flimsy from the mf. Well we replaced all the cross members with tube and heavy channel instead of the cheap 1/16th channel it had. Also channeled the main frame and put heavy angle on top. Anyway the scrap from it brought about $500 the skin was al and had a bunch of steel supports. Still not done its a lot of work too.