I think your all looking at this the complete wrong way.
For someone with little to no experience with setting up something like this you are much better off buying a NAS (Network-Attached Storage)
You can get them fairly cheap if you buy them without the HDD's preinstalled.
Some also come with preconfigured raid arrays.
Centrecom Prices
http://www.centrecom.com.au/catalog/defaul...e=1&sort=3a