I borrowed this info from elderscrolls.fandom.com:
Princely Dawnlight Palace is sometimes available through the Crown Store for a limited time.
May 10–14, 2018.
March 7–12, 2019.
November 11–29, 2021.
You might be waiting for a while since it was just here a few months ago.
I have a passing interest in it primarily due to its location in Hews Bane but it's quite pricey for what I want it for. I'd settle for a simple tent outside the city limits but no such thing exists.