I took my cue from the Waldorf schools I've visited that have been in real "make do" locations. Parsifal has a lovely old school building now, but at one time it was housed in an ugly, kinda run down, nondescript institutional boxy school behind the Canadian Tire in Ottawa's south end. They had decorated it beautifully though, and the biggest thing that changed the space was draping those ugly ceilings!
I thought it would be a good idea for my basement too.
But that is a lot of yardage of fabric! The room is 24x14!
I got these silk saris on e-bay some time ago. With shipping from India they were 1.00 a metre. It isn't finished along the edges and it's really hard to sew with, it shreds easily. I didn't have any choice in colours and got a mix of earthy shades that I'm going to use upstairs in the living/dining room, but there were four lovely mid shade pastels too.
I pinned them up with thumb tacks.
Next post on dealing with miserly little basement windows!