Currently, if you loose everything and find yourself drifting in space, there's no way you'll ever be able to fly again. There are a several solutions to this:
- Make the power beam part of the suit. So, even when all items are lost, the astronaut can still construct a factory AND power it, provided he has the materials.
- Allow the suit to be able to construct some power generation block or allow a basic factory to burn metal mesh and crystal if no power is available.
- This might be the easiest one to implement: Add a "trivial self powered factory" block that can only be crafted by the suit, and allows creating power blocks, thrusters, and ship cores while using crystal+metal instead of power.