Well, if your dad wants to pay for it, get some dynamat or secondskin and start hitting areas one at a time. When you find a rattle, dynamat the hell out of it. Find another one? Dynamat the hell out of it lol. As for the cupholders and stuff, you might have to try some more creative solutions. For example, I put Neoprene (foamy tape stuff) on the back of my license plate. It doesn't rattle anymore.