The same question popped into my head, initially. Upon second look at the article, the words "Scottsdale" "Revocable Trust" and "trustee" immediately led me to believe it was mom and dad's pad. My brother, as trustee of my parent's estate, is currently selling their house as both have now passed. I assume there was something written in Mr. Nicks' Will that directed sale of the house. I'm not surprised that Stevie was chosen as trustee.
I can also only assume she probably, for the most part, had "her people" handle many details of the responsibility. I hoped there would be a picture of the house. Since names and approximate location of the home were published, I wouldn't think it was an issue of privacy.