Setting Up Multi Network With Multiple Domains

Ok so whatever the terminology is today this is what I am trying to accomplish. I am working with over 200 domains . I am waiting the ability for each domain to have visitors be able to create there own blog and pick from any of those 200 domains. This is hosted at go daddy with premiere business hosting so i should be able to do whatever i need to. I also want each domain to be able to look different due to different topics. So with multisite, multinetwork, domain mapping it doesn't make sense what and where to use them for what I want. I am under the impression that each domain doesn't need a separate install but maybe I am wrong. Can someone make some sense out of this please