To me that server seems a teeny weeny bit overkill as a personal cloud server. But who am I to answer that, I know nothing about this kind of stuff :D http://browser.primatelabs.com/geekbench3/3767194
Energy wise they're not that insane, 40W ACP (Average CPU Power) each or 60W TDP each.
Kenton, thanks for stopping by the forum. So, could you give us your one-paragraph elevator pitch about why we should use the Sandstorm platform for a basic personal server? Pretend I know very little about computers, have no formal IT training and zero development experience, and have until now have never even considered building my own server. (You don't have to pretend very much to get there.)
It may help you to remember that, at least as far as I understand it, the reason why Sandstorm has come up on our radar is that many of us in the community are interested in moving or have already started to move our personal data and activities into the cloud, but we're not comfortable turning all of that data and control over to Google, Apple, or Microsoft. People started putting in a lot of requests to Wendell and the Linux channel for tutorials about how to start building our own cloud-accessible servers. I can't speak for the community or for the TS team, but that's at least how I understand the impetus for this series.
Here is a pretty good podcast with Sandstorm founder Kenton Varda if anyone is interested. Goes into a little bit about the security, how it works, how it's built etc.
Another reason is because it's nice to have everything in one place, rather than jump around to 20 different services trying to keep track of your data. Privacy is one advantage, but there's more to it than just privacy.
That means, as long as you do not allow a connection from the outside world to the server it wont be able to be used from the outside; only locally on your home network.