I built mine starting with a salvage RV camper frame. It already had 5000lb axles with brakes. All that was required was the removal of the wooden floor and the addition of some additional stringers on 2' centers. I dovetailed the last 4 feet used diamond plate for the floor and purchased fenders at tractor supply. It is 24' and has room for a box on the front or a golf cart/4 wheeler. I have about $1100 in it. Jim