soundproofing a 2 car garage?

[SwimIsAwesome =]]

me and my friends are in a band, and we want to turn a garage into a practice space/recording studio. its a 3 car garage and we would be using the pyramid style studio foam. we want to do the long wall against the house, and one of the short walls on the side. can someone tell me what it would cost to do this? we woud be installing it ourselves.

 

[mike p]

You may check into putting a second layer of drywall on the walls. This is one way of soundproofing a home theater setup.