I know Sulky is high quality, but I was thinking maybe I should be looking into buying threads on cones now that I'm doing so much embroidery. Would that really be more economical?

For most consumers, buying anything larger than Sulky's 850-yard spool could result in wasteful over-spending because it may take 10 to 20 years to use it all, and lesser quality threads may not remain usable for that long. Over a year and a half ago we began adding an additional 50 yards to our King Size 40 wt spools (now 850 yards) at no extra charge.