The Raid stuff is interesting-- seems like anything more than RAID 1 is overkill. This is a single doctor office -- not a program trading shop!
You're right, there is not much benefit in a single doctor office. Unless you want more speed. Speed is the main reason. The benefits start increasing when you're a single doctor with 2 offices or a multi-provider office.
A single RAID 1 array becomes insufficient to support 10 simultaneous users. Everyone starts feeling slower. RAID 10 is faster. Use that instead. It all depends on how many people you have/how many computers you have. It can get crazy depending on the I/O profile.
Sometimes I get crazy messages about setting up servers with 8 providers and/or 3 remote locations. They (IT Consultants) expect a response in minutes too lol. I think it's kind of funny. They're getting paid to consult and come up with a solution. Then they ask me for the answer.