Be careful when you do the math and figure you'll save money if you take up spinning to have handspun wool to knit with.
No acrylic allowed in my house!
And then there's the matter of what breeds of sheep make the nicest spinning fleeces.... =:-0
I am almost sure my neighborhood is not zoned for sheep and other livestock.
I do buy some bulk acrylic to make baby blankets to give away...on the principle that the recipients probably won't know how to deal with shrinkable products.
And I do buy the occasional weird novelty yarn, but it's for scarves, so it's never too many skeins.
But as a spinner with a large stash of fiber, yarn is not the problem...