I'm interested in building a mining rig with a Raspberry Pi and 10 (to start with) DualMiners to mine Litecoin. The guides on this thread are great. It looks like such a rig will be compact, scalable, greener (compared to GPUs) and easier to pull together and manage than other approaches.

Sure it will have a longer ROI than a more traditional GPU design, but I'm betting on the currency increasing in value (as we all are), and I want to have more fun than just currency speculation.

My best deployment options are to put the rig in a server closet or colo rack. So power and cooling are not a problem. Stability is my main concern.

Since I'd be running the rig headless in a different physical location, it's important that I not need to fiddle with the miners once they're up and running. Note that I'll have VPN access to the Raspberry Pi. And if need be, I can plug the USB hubs into a managed UPS that would allow me to power cycle them remotely.

Can anyone with a similar rig comment on stability? How often do you need physical access to your rig, and why?

Thanks in advance.