I have watched a lot of Chip & Joanna Gaines lately & decided to shiplap my wall board walls at the cabin.
Easy and relatively cheap to do.
Local lumber yard has the underplyment plywood. It is cost effective easy to use and looks great.
pre-ordered 4x8' sheets cut into 6" strips.
Used laser level. Started bottom up. Used popsicle sticks for spacing.
Brad nailer 1 1/4 long nails.