My home for 23 years was more than 150 years old. After we got the holes in the floors and walls ( exterior) fixed, we consulted a historic architect . When asked how in the world one prioritized all the fixes that were needed, he answered," Just pick one thing at a time - not a whole room, but one door frame , or one mantle." Good advice because things eventually got done- for the most part only to the livable stage.
But I can't wait to get to furnishing the house!