If we built a self replicating probe and sent it to the nearest system, and from there it sent off 2 more probes and so on, in 2 million years they’d have reached every system. The only cost would be the initial probe. and any species that has mastered it’s own star system could do that. They could send out their own genetic material and spread their form of live.
They don’t have to go themselves out into space, they can send automated machines. We’ve already started doing just that with very basic machines for scientific curiosity. I see no reason why we wouldn’t send out replicating probes when we have the technology to do it.
However we do come back to Fermi’s Paradox: the universe is 13800million years old. So far we have no evidence a probe has reached our star system. Where are they? Maybe we just haven’t stumbled across one yet. Or maybe life really is very rare?
At this rate we’ll need a Wine/Proton that runs on Windows to allow you to run Windows software.