What is the most economical design to achieve orbit? Even though money is unlimited at this stage in the game, it seems it will become an issue eventually since parts have a pricetag. Has anyone been working on different designs for best economy? At the moment there are no payloads other than the capsule itself, (Maybe use full fuel tanks as payload to make it harder) but it seems like this is a good challenge since it is one of the main problems facing real life space travel.