Let's see.....I'm figuring that you must have a single speed beach cruiser with a coaster brake? And one or two wheel hubs have ripped apart on you? That's the way I'm reading it. I think cheeseman is right that a 3-speed hub is not going to work. At least I can't see any way of installing the drive sprocket to that.
A multi-speed, derrailleur (de-railer) type wheel (with or without shift kit) is just about your best bet.
Though most of us agree with you, cheeseman, in that we prefer good spelling and punctuation, the consensus here seems to be that we don't make an issue of it. Writing well simply comes more easily to some people than to others and we don't want to make good people feel unwelcome over something that's not terribly important. If a post is just too difficult to read, then we don't finish reading it and we don't answer. I'm not speaking for everyone here, of course. But I have noticed that this issue is not productive.