You might be able to get a good guesstimate from here:
https://www.shabbyfabrics.com/Tennes...rn-P50692.aspx
I've made a kingsized Tennessee Waltz (54/40 and snowball), but used scraps other than my main background color. If I were just guessing I would say a total of 5-6 yards for other than the background and use extras for pillows or backing.
here's another:
http://quiltandsewforever.blogspot.c...see-waltz.html guesttimate that gives some ideas....