Really hard to say. We started experimenting with the idea back in March, but didn't start putting fulltime nights into it until August. I'd say a little over a thousand man-hours over the span of 6 months, but I may be well off the mark.

It was a fruitful experience and if we want to count in the hours of reading and studying that this project has spawned, it would be much more than that.

Anyways, the real question is "how much did it cost?": $1600+ in sushi dinners! :)