I would like to have out put from one computer to show on 8 monitors (cloning). If anyone did this kind of task before please give me some directions how to do it, what kind of hardware, software is best for the job. Thanks

Never done it.

This might suit your hardware needs:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817707136

Ultramon gets mentioned a lot when it comes to software for multiple management. Never used it but it looks pretty capable.
http://www.realtimesoft.com/ultramon/

Let us know what you learn and how it works out.