I have the exact same Carolina carport. I bought it the sides already installed, but also left both ends open so I could drive thru. My thoughts are that the top is probably already one color, mines brown, The sides can be what ever color you want, I chose a sand color to match the sideing on my house, as well as my barn carport with the high center and shed sides. All of my Carolina sheds have the metal running horizonal. It easier to install horizonal because you dont need any other studding material like you would if you chose to install vertical. also if installed horizonal, you can just level the top piece and run self tapping screws to hold it up then slip the next lower piece under the edge and continue all the way down to the ground. Also since the metal is 3ft wide with groves, the groves are 1ft apart, you can underlap the bottom piece by one ft and have a even 8ft of coverage using just 3 pieces of metal to each side. Any metal roofing company can make you metal what ever lenght you need and pretty much in any color, and they can sell you the colored screws to put the metal up. While buying the tin, also get them to bend your corner pieces to cover the ends of the siding it makes the job much neater in appearance.