The best thing would be to hire a squirrel to kill her. Simple and cheap. Then, kill the squirrel and leave its body in front of Naruto's place, making sure that the corpse has Sasuke's address in its pocket.
Naruto would find the body and the address, and considering his high level of intelligence, he'd conclude that Sasuke masterminded the crime and would immediatly waste Sasuke.
Since that would be more interesting that Sakura's death itself, there won't be need for episode consuming funerals for her, and best of all you'd have both of them done with, and get away with the evil deed.