The cost of the paper alone (I would hang it myself) is making me think outside the box a little and reminded me of this project featured on HGTV done by the Rethink Design Studio (found via Full House).
All you need is a stencil and a sharpie. I love that they went with gold! Genius!
I think one of these Whitewall & Co. stencils would really do the trick, but what I'm really itching to try is a recreation of this beautiful wallpaper in Lisa Fine's Paris apartment.
I think I could maybe pull off something like this free hand with black, gold and green (maybe navy?) sharpies? It would be a fun project and the best part is that if I mess up - I just use a little wall paint to touch things up.