currently exactly what im looking up now.
Im using white conti board which saves a lot. But your looking at £50 for wood. Im doing a bit of a funky design. Its going to be four small windows with the front folding down on a hinge. Simply because doing that is waaaaay cheaper then getting suitable glass for a 6foot length. With this design i can get away with 4 1ft square "windows" and it means i can use 4mm glass for a fraction of the price.