I finally decided I should put two sides on the portal to the caged garden – tunnel effect.
Using 100 year old boards from a saw mill we helped tear down last year.
Timogarden lumber yard
It consists mostly of salvaged lumber from the saw mill and a demolished deck, metal roofing and a lot of odds and ends.
Here I can find a bit of just about anything but never quite enough.
timogarden 
I have a friend who just made a very costly mistake involving plywood. She may be starting a personal lumber yard too!
Love your statement: “Here I can find a bit of just about anything but never quite enough” Sounds like my purse! hahahaha!
If you have space, a recycle lumberyard is great.