It can be done cheaper, but I'm sure their package will be pretty complete and you won't be tracking down bits and pieces. I have no idea what they're charging though.
EDIT: I looked closer, and got an idea what they're charging. Holy CRAP. $6k and up?!?! *gulp*
That can be done a LOT cheaper, like less than half.
But those packages do look very complete, soup to nuts.