First thought: this is crazy. This is not an 'easy' option. How do you integrate the thing? What mods are you going to have to make for vac environment? How is this in any way better than firing up a big inert lump of steel?
Second thought: Actually those are interesting problems to solve. Fun problems. This is how you motivate your workforce and keep your company in the public eye. As soon as I thought about the vac thing, I immediately wanted to sit down and work out how to solve the problem. Dammit, I want to go work for SpaceX...
And that (plus a few billion dollars) is the difference between Elon and normal people.