Nailed it. The first one there is always the "crazy" one. Then, 18 months later, there are 25 companies doing the exact same thing, and you have a market. A virtual location in orbit where people can place things to go to Mars is a very tasty location to me. Everything from cubesats to Amazon Fresh shipments can sit there and be picked up by SpaceX for the continuous stream of missions going back and forth to Mars. (And the Moon.) I see some sort of a hub thingie floating in orbit. It has solar panels, power, and thousands of "mount points" where companies can attach their thingies to await pickup by SpaceX. Containers of water. Electronics. Food. Each of them just a simple box with a magnet on one side that can maneuver up to the Hub, attach, and await instructions to detach and maneuver into the waiting ship. FedEx hub in space, man. ...create a massive demand for space based services IMO...