This week the slab was backfilled, completing the first stage of the project. It will sit until Spring, when the building will be delivered and stage-two will begin.
Confirming my estimations that our window was closing, this morning we got our first dusting of snow. There wasn’t much on the ground, but pouring concrete in such conditions is much more difficult, so it was nice to have completed the slab by now.
Now I have all winter to work out the finer points of my plan for what to do next.