There are really two things that have to occur in order for a new technology to be affordable to the mass market. One is you need economies of scale. The other is you need to iterate on the design. You need to go through a few versions.

The primary means of energy generation is going to solar. It will at least be a plurality, and probably be a slight majority in the long term.

SpaceX has the potential of saving the U.S. government $1 billion a year. We are opposed to creating an entrenched monopoly with no realistic means for anyone to compete.

You could power the entire United States with about 150 to 200 square kilometers of solar panels, the entire United States. Take a corner of Utah... there's not much going on there, I've been there. There's not even radio stations.

Actively seek out and listen carefully to negative feedback.

Land on Mars, a round-trip ticket - half a million dollars. It can be done.

Persistence is very important. You should not give up unless you are forced to give up.