Power
Most systems will require Power to function, as well as general overhead for the size of the station itself (e.g. every 10 tiles of the station, rounded up, requires 1 Power). Power will be available through a variety of systems such as cheap and passive (but low-yield) solar panels, or fusion reactors that generate a lot of Power but are expensive to build, generate a lot of excess Heat, and require fuel to be purchased.
Inadequate Power supplies will cause Power-dependent systems to fail at random, remaining offline until manually repaired. This could easily worsen a situation if, for example, crucial life support systems fail, killing or driving out the NPCs needed to install additional Power systems.