Can you afford the leccy? some of that kit is not exactly known for sipping power you know.
Where's the leccy going to come from if any more power stations get switched off.
Don't talk about Wind Power. Remember that in winters we sometimes sit under a High Pressure for several days (if not longer) with cold winds coming straight from Siberia to freeze our naughty bits off.
Otherwise, a nice thought but be careful with any USB devices they might have cloned chips and subsequently get bricked. What price your data then?