We are looking for a structural engineer to design a split shift trailer for tiny house.

We need a 30 foot split shift triple axle trailer designed. We would like for this product to be based of another company product. We want to make with changes that we would improve the products weight distribution. Black in color and with shipping container ties and foundation. This product will exclusively used for tiny homes foundations. We need a list of building material and cost to build based on US standards. The dimensions of the trailer.