I suspect you need a baritone acoustic, a twelve string acoustic, an acoustic-electric bass, a baritone uke, a tenor uke, at least one strat, an SG, and if you haven't got a Gibson or a Martin you need one of those, and it wouldn't hurt to have two or three amps, a sound board, some speakers and monitors, microphones to mic the instruments and your voice, maybe one to four for ambience in the room, and then a Fender jazz bass and another amp for that, then you can talk to Russell and Jerome about the pedals you'll need. Better start saving.
Or, you can get by with one acoustic that fits your hand nicely. It's all up to what you want to do and how much you have to spend doing it.