lizwh

I really liked this -- a presentation that talks about design and budget realistically.
carrying the window in the plane of the wall was a nice touch.

Definitions of 'green' take into account life cycle costs.

Vinyl is a green enough product because it is durable. Stains and paints are mild poisons that have to be reapplied frequently. (You say 25 years, but my experience is closer to 5.)
The wood fiber and the fly ash in Hardi products are scrap or recycled, so they're green too.
Using wood is green only if the wood is responsibly farmed and shipped, and a lot of it isn't.

My problem with vinyl is that it's ugly, and this article goes a fair way to address the parts that make it ugly. I would have liked to see more pointers on ways to get around using j-mold.

no footings? might be fine, because who cares if a shed moves a few inches. update us after the first or second winters, let us know.

I think it's important to tell readers that a typical closet is 2' deep and a laundry closet with storage built in to the doors would need more than 3' of depth.
Like another reader, I was curious about the drain pan and venting. Since you elevated the washer ( good idea, but why not 2'?) I assume the box is there to accomodate drain.