worked at it all day again. I used the plastic corrugated board (like yard sign material) for the water proofing of the coop roof under the tarp. lightweight and 100% waterproof. welded up a latch mechanism with some extra conduit, bolts, and a nut. pretty clever if i may say so. This is why I liked the conduit idea. easy to tack something on. some washers welded on the prevent the door from swinging inward. Hinges for the door are made for 3/4 conduit and bought them off a guy from the makerpipe community who 3d prints them.
Added a rain gutter to one side which si where the water tote will live. Plus I won't have to go inside to fill the water if needed, just dump a bucket into the gutter.