Using a car port to cover your car is definitely a smart idea. Prairie School architects were the first ones to use car ports starting in 1909. A lot of people have cars that need some type of storage or protection from the elements and using a carport can help that problem.
If you love to go RVing you probably like to make sure that your RV is in tip top shape, all the time. Instead of letting the elements destroy your beloved RV, storing it under metal garages can keep it safe from weather related problems.
If you are more of a boater and less of an RVer, storing your boat is probably something you care about very much. If you wanted to build your own car port you could use the metal carport kits. With the use of metal carports people who enjoy boating can protect their boat when it is not in use. Protecting your boat from dangerous UV rays when it is not on the water is important to elongating its lifespan.
Families that live in areas of the United States that are used to seeing the sun a lot of the time can prevent their vehicle from feeling the effects of the sun over long periods of time. With a car port car owners can make sure their car color stays rich and shiney.