Eric,
Thanks for your reply. While I agree, as I wrote in a different way, that it is a personal and financial choice whether or not to use a server, we will have to agree to disagree on the NAS solution.
NAS is a solution for what it was intended. Storage and backups. If you wish to do more, then you would do step up to a more versatile solution such as Netapp, but that would run thousands of dollars.
In my opinion, Bill would be much better off purchasing a computer for his peer-to-peer that has a lot of RAM and a good backup strategy.
Given the conflicting information, I would recommend that Bill talk to an IT person, preferably one with SMB qualifications and Microsoft Certified.