How do i talk my parents into buying me a rabbit?

I've told them every single second to get me a pet. They just keep telling me that it's a big responsibility and that i will not take care of it. I have done countless hours of research on them and already know the price all the cage, food,toys,etc.,etc.. And my dad told me that I would have to juggle(soccer) everyday in the summer for 20 min. and i do if I'm not at my friends house or somewhere. I know what i want to name him and I already have the bed. The only problem is that I have 3 giant dogs and they smell. My mom thinks that the rabbits and all those animals smell. But i promised her that i would clean it everyday. (the cage) Please help!!!