I need to immigrate all 8 members of my wives family from ghana to the states. What possibilities do I have?

As a U.S. citizen or lawful permanent resident, you can file an immigrant visa petition on behalf of your spouse and any stepchildren. You cannot petition for any inlaws. Your wife would be able to petition for her parents and siblings once she became a citizen. You can read more about family immigration at http://myattorneyusa.com/family-immigration.