Welcome aboard, David here. I live in the central valley. I found plenty of resources for parts and plans.
There is no right or wrong design. Try looking at a Trailer repair shop for metal skin ie:(big rig trailer repair). you can get 49"x110" sheets. I picked up some hardware from pick n pull as well as Habitat for humanity. As far the actual build... measure twice and cut once. good luck man! let me know if you need some tips
