Well, spoke too soon. Somehow, I seem to have misplaced my sewing machine. I thought I knew right where it was, but it turned out to be some of my photography equipment.
Words can not express just how much I don't want to have to sew a tote bag by hand. I've got tomorrow off, hopefully I can find my machine then - if not, I'm going to have to change my plan and just buy a basic bag to revamp rather than starting from scratch.
Fortunately, everything else is okay - just a little shopping I've got to do, and a touch of inspiration to wait for.