The show ends with another Friday Night Dinner – not the one immediately after the Thursday night scene at Stars Hollow High School, but the following one, more than a week later. Lorelai tells Emily that work began on the house the previous morning, so that we know they have already done the termite fumigation, and everything is on track for their house to be fully repaired.
Getting a house’s foundation repaired usually takes about three days, so it might be be finished over the weekend. Even allowing for extra time because the damage was so extensive, we can feel confident that Lorelai’s house will be completely fixed by Tuesday or Wednesday at the latest (in time for the next episode!).