I have thought of putting my fabric on bolts also but on a very limited funds. I went to a class at my LQS and she told us they send all their cardboard bolt to the recycle center. She told us if we wanted any just ask we could have them for free. So you might ask your LQS for their leftovers.
As for the awesome painstaking job you did- Clapping and cheering!!!! And um can i go shopping at your house?? LOL and kissis to that DH,,,,, make sure u keep him awhile lol