Holy Hannah!!! I once found fabric at $1.00 a meter and bought 32 meters. We were on holidays and I had to consider the room in the caravan. After I'd purchased it the lady said we can get that sent back to our store in your home state. Too late as by then others had fallen upon it too. There weren't a lot of different fabrics but I bought 4 meters of each for backing. I'd know better if I ever came across fabric at that price ever again.
Anyway, congratulations. I hope you have plenty of room to stash it. Happy,happy quilting.