That is a lot of stagnant energy sitting there, especially if it's not been cleaned out, paired down, and organized.
We spent a long time doing that in our old place. The time it took to door that made all the difference in the world. I'd recommend doing the Forgiveness Facet's energetic space clearing first, and then listen to the "Get Around To It" Paralimininal with the end in mind, and go at it. Having a friend to go through it with you can make all the difference in the world too.