A blog I regularly read, Sixty Minute Artist, just put up step-by-step instructions of how he builds low-cost frames for his panels! When he sells his work on Etsy, he offers the option of a pine box frame for an additional $10.
I’m no woodworker, but with all the pictures, I’m pretty confident I could manage this project. (And, of course, there’s always some people downstairs here at the office who could probably help me out.) Click here to read the post.