After a very informative and hopeful meet with professionals in the estate sale planning arena, we have our seeming swirl of things to do reduced down to more definable tasks.
All the research, pricing, staging, advertising, managing of a sale is removed. Now we must do general cleanup, seriously consider what we want to keep and remove it from the mix and maintain a tidy appearance to the property until the sale. Post sale we committed to the overall cleanup.
The hardest part will be identifying what we want to keep and not allow too much sentimentality to attach to every little thing (or big thing) that mattered to my Aunt.