Covered front porch on a doublewide

I am looking to build a covered porch on a doublewide and am in need of the right tradesman for the job. The size of the porch will be large (more than 300 sq ft) and I am looking for materials such as wood. The design is flexible and so I am open to any suggestions for building the ideal covered porch. If you are someone with experience constructing outdoor structures, please get in touch as I am eager to get started right away.