Well, this is probably old news to a lot of you, but it was new to me!
Anyway, I ran into a lady on TDY at the fabric store that said she uses plastic, flannel backed tablecloths that she buys for $1 as a quilt board. She tacks them to the wall and the fabric sticks to them.
Well, I tried it and it works great! Hmmm...only $2 for an oversized quilt board - leaves more money for more fabric!