I can’t find the thread where someone asked where to find $20 duvet covers.
https://www.zulily.com. (You must provide your email address to browse the site)
Zuilily frequently offers deeply discounted bedding. Yesterday’s one day only sale was $20 duvet covers.
They often offer summer weight (light batting/thin) quilt sets for $30.
I have purchased several of their quilt sets for less than $30 each. due to bookings that are close I rotate the wash & place for the quilt sets for each guest (I don’t have time to wash & dry between guests so I have two sets)