RV carport with deck

I am looking to build an RV carport with a deck that will fit two recreational vehicles. The build material will be primarily wood, and it will be a freestanding structure, so there will be no need to attach it to my house. I am looking for a skilled builder to design and construct a carport that is modern. 30ft long, 20 wide, 12 ft tall. Want to be able to add a sunroom with roof later when we save some more money. Thanks!