Well, it's over.

We lost the location, Ecobox, due to last minute skittishness on matters of council and landowner permission, budget, and various other things. As I'm heading to Ireland in about a week, and I don't get the sense that there's such a groundswell of will to see this thing through here, might as well call it.
We also had a few troubles lining up materials, as Paris just inexplicably lacks certain things, like greenhouse plastic. But we had a few leads and probably would've got it sorted this week.

So that's that then. I'm going to talk to some people in Cork when I arrive, there's a fairly well established permaculture school there and maybe a bit more interest than here.
But this was always more of an experiment / temperature check than a project I was determined to see through. I simply don't yet know how viable this kind of approach to food production is in Europe and other Western countries. It won't happen until there's the will to do it, and I have doubts that currently there is. When I'm in more developing countries I imagine the dynamic will be somewhat different.
Mind you, this is Paris. If I'd really wanted to give this thing its best chance I would've gone to Copenhagen or Berlin. But I just wanted to hang out in Paris for the summer.
And now Ireland.
I'll keep you posted.