I think if I was dead set on the micro Mutable clones and 84hp, I would go with something like this:
ModularGrid Rack

You still haven't mentioned what kind of music you are trying to create, or given us any idea if you have any other gear to pair with a modular, so this is all just guesswork. First and foremost, I would recommend buying a larger case than you think you currently need though. That would be the first universal piece of advice I could give.