Being a fan of science and Dr Karl, I'm going to answer this in a scientific way.
A very good alternative to an electric conical burr grinder or flat bur grinder is a quality hand grinder from a company like Hario Japan - actually, is some regards it can be an even better choice if your making coffee for one regularly. You will become closer to your coffee making process and there is almost no heat generated, it is completely portable and the almost silent operation is something to be experienced. A quality hand grinder can be purchased for around $70.