Mom called this afternoon with excellent news.  

She's feeling much better (seems to be over her shingles) and her oxygen number is set all the way down to 1, from a possible 10, which means she hardly needs much of an assist.  In addition, she's back to using her rollator instead of the wheelchair.  Tomorrow the Home Health Aide is taking her over to her apartment for a check to see if there's anything that needs to be done there before she's released, though I'm pretty sure her place will pass muster easily.  While there's no date (yet) for her release, it is looking more and more imminent.  I did remind Mom that once I arrive the end of the week I'll be available to stay there with her, which may make the decision to send her home easier for everyone.