this reminds me of a monster-sized top that I finished for a customer. She had joined the t-shirts and hired me to quilt it for her. It was HUGE - barely fit on my LA machine, and when I finished it, it completely engulfed my queen-sized bed. HOWEVER - she was thrilled with it. So, I'd say back it, quilt it with a panto (it's amazing how well pantos work on t-shirt quilts) and call it done.