Questions regarding search engine optimization

[micahcobb89]

I am dealing with a client, who has asked me to do five closely related tasks. He possesses five different types of business, and he wants all five websites for these five businesses. So, I think if I include these in the same home page, with different domain names, Google will ban the site because it is against the policy of Google. I think Google will not index these domain names. Do you know about any reliable solutions for these problems? I need some useful information regarding the issues so that I can solve all these issues of my client.