Interesting post.
I have a question about that NAV Rasperry Pi model.
So when you buy it - how complicated is the installation?
Or you just plug it into power and it starts mining?

How many NAV coins possible to mine monthly with it?
In what time the investment ($100) might return?

I'm thinking may be to buy, as I like PoS concept more than proof of work, etc.
But if the mining is hard to setup than there is no need in it