I would say something like this: "Due to an unforeseen leak in our kitchen, we are in the middle of remodeling the kitchen and it will not be completed until after Thanksgiving. Therefore, we will not be hosting Thanksgiving dinner at our home this year. You will need to make other arrangements for the family dinner this year". Leave it at that and you don't need to tell them what your plans are. They are all grown adults and can either figure out how to bake up a Turkey or go out...but that's not your problem.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
