It’s feasibly if you don’t have to launch 6 rockets to get it up and and going, i.e. if you’ve allready got a regular supply line into space to a permanent space station or a moon station.

If you want to go from London to Liverpool by train, it’ll cost you millions to build the rail and purchase a locomotive. Except it’ll actually only cost you a couple pounds for a ticket, because all that infrastructure is allready in place. Because generations before us invested in all that stuff to supply the mines and the factories.