Yarn: bulky 
Scarflet is a silly-sounding word... Anyway, I made one. My very first one. It's also my 3rd loom-knitting project (see the other two here and here). I've wanted a scarf of this style for about a year, but the yarn and the pattern I was using last year just weren't working the way I'd envisioned they would.
The only real problem I ran into was when, after I was finished knitting, I decided to use giant buttons instead of toggles. This meant unraveling several rows in a way that was strategic enough to put all of the loops back into the loom to make appropriate button holes. Took probably an hour (or longer) to undo the rows, make the buttons holes, and then finish it off. Maybe another half hour to get the buttons on and tie everything off.
How well do you think this item would sell at a craft show next winter if I made a small stack of them?