My friend Debra had more than that, all organized. A sewing room, two fabric storage rooms and a hall closet both up and down stairs.
She was a very bad influence. She taught me the phrase "I'll take the bolt" and made me practice. Thank heavens a full bolt of most fabric at joann's is 6 yards.
She is completely responsible for what I call the Fabric Feeding Frenzy, a week to ten day period over which I somehow purchased a little over 300 yards of fabric.
In my defense we scored some stunning deals, right place at the right time. We got dupioni and good upholstery tapestry for $2-3 yard.
Mind you I think I sew up 10-15 yards in a typical year.