I've always wanted to try an external e-ink mounted vertically as a side monitor for documents / code views / etc. Honestly I'd be fine with an exceptionally low refresh rate if it would mean a reasonable reduction price - right now I just can't justify > $1200 for a single monitor.
On another note - unlike "streets ahead", I don't think "rake on my lawn" is going to catch on. I had to scratch my head and even after I understood what you were going for - I'm not sure how it makes sense. What's wrong with having a rake on your lawn?