Yeah cost is the main reason, but at the same time I don't want the cheap badly made shit so I try to settle for somewhere in the middle, lowish cost and decent quality. If I had enough money I'd just buy "everything" and get it all set up perfect, but I don't have the money for it so I have to do things one by one, so nothing is going to be perfect. And it's funny you mention brakes because mine are fucking terrible