Well Lownie, in a recent episode of the Lownie Report, said that SF could potentially get seven figures for a book like this, especially if it was tied in with a major interview. and as he is a literary agent as well as a historian and author, I reckon he should know.
He did say however that SF might be restrained by the potential consequences of her actions on B and E and their relationship with the RF.
But if the daughters’ “careers” are trashed by the Epstein scandal and SF really has no money, and her options for potentially leaching off others are now limited, then she might decide to go for the big money option. She always has in the past after all!