There's still a lot of work left to be done, but all the rotten wood is cut out, the rotten sill plate replaced, the rotted-out floor replaced, all the joists buttressed, the wall closed up, and we have a front door and a finished front hallway (except for re-tiling the floor) again. It was a pleasure to watch our contractor at work, adjusting every joint and fitting until it was perfect. He's a real craftsman. I watched him frame up the front door, then take it down and trim out more stucco from the wall and frame it up again, and then again, before he was satisfied that it was right. You couldn't slip a sheet of paper into the joints in the oak trim in the archway where the front door originally was.
Still remaining to do: Trench out the foundation wall the rest of the way, coat it with rubberized sealer, install a proper foundation drain (we're increasingly skeptical that there even is a drain at all, having completely failed to find any outflow pipe anywhere), refill the trench, properly flash the wall-to-foundation joint, finish applying exterior trim, fix the gutters, and install a heat tape along the edge of the roof so that we don't get ice dams damaging the gutters again. The heat tape is a stopgap, but it'll carry us over until we can afford to get the roof redone and adequately insulated.