I don't have the layout completed yet as i am still gutting the boat. However, I will be using for duck hunting so I am increasing the floor space and decreasing the deck size. I would say 25% rear deck compartment/50% floor/25% front deck compartment
Below is a link to find local(ish) suppliers. I used it for my floor and found it easy to work with if you need to make minor adjustments, such as cut-outs for ribs. The type and thickness of Coosa you buy will depend upon the span between supports. They will respond to those questions via email. It is expensive and only worth it if you plan to keep the boat long term.
3 sheets for that total doesn't sound like a bad price to me.
Don't know where you are but you should try some of the industrial suppliers too. While I decided against Al for my project, I found I could get 12x4 sheets delivered for less than a 4x8 will call from the local "supermarkets."
I had good luck buying marine ply from a boat builder/refitter in the area. If you buy the Lloyd's certified stuff you should be ok. Price might be more but per your experience--worth it in the long run.
I’ve had a couple of issues with marine plywood in eastern Washington. Might have better luck finding it in Seattle or Portland but, that’s a 5 drive one way. My original thought was aluminum and 5052 actually costs less than marine ply by the time you add the epoxy and other prep for the wood.
You're right on cost. I went with Coosa because it works like wood and as a long time woodworker I feel confident I know what I'm doing with it and I have all the tools. Al would cost me more because I'd need some tools to do what I wanted to do. But my framing is all Al because most wood just isn't going to last.
