busy day . . . If you have multiple sites of a similar theme, you need multiple Class C's. You can either get hosting from multiple providers and deal with the associated headaches of multiple bills, multiple control panels and multiple support contacts, or you can use
GotWebHost.
When I say of similar theme I do not mean the same template or color. I mean if you have 50 sites that deal with car parts: ie: one for wheels, one for stereos, one for seats, etc, they are of similar theme.
If one site is cars, one is fruits, one is bicycles then you are okay and can even share the IP's among them.
Cross-linking should always be done with care.