I've put together a DIY 5x4 camera for £30. Unlike some other projects that require some pretty decent engineering skills, my camera should be within the capabilities of most people. I've written about it in two parts starting here. My intention is to see how I get on with large format using this set-up and, if I like it, start saving for a gorgeous Ebony RSW45.
Not everyone has access to the superior driftwood found on Barry sands
Interesting project BTW, I have a few 9x12 cameras.