I am wanting to insulate my 30x30 shop with 2x4 walls on 2 foot
centers. Is there an online source for insulation or is Lowes or home
depot the cheapest place to go. Money is getting tight. I can use r13
or r-19. I live in Kentucky. The winters get cold but it is not like
some of you guys up north. And this is a garage/hobby shop not a place
of business.

Any suggestions? I have done a search and found unfaced r-19 for 30
bucks for 75 square feet but if I am figuring right that comes up to
600 bucks.