So for approximately 30 euro, I've purchased 5 wooden frames and had 5 mats cut to measure. I had the glue (bookbinder's glue) and some quilt batting already. I spent 35 euro the other day to have a cross stitch project of the same size professionally framed, so I am definately on the right track here.

(I got the best do-it-yourself framing tips from Shakespeare's Peddler.)

Here are a couple of pictures - one shows the projects as I stretched them and the other shows the first three to be completed.