I think it would probably have to refuel with every payload. Changing orbits that fast isn't cheap. It would be cool to see an analysis of this, I don't know if

I think it would probably have to refuel with every payload. Changing orbits that fast isn't cheap. It would be cool to see an analysis of this, I don't know if it would really make sense. I've seen some interviews with the space gun guys but unfortunately nobody really pressed them on this issue and they didn't mention any plans for space tugs.