if economics is the biggest concern
But I don't think it's possible for economics to not be a concern. The "economy" is just the interactions of people exchanging resources, sometimes controlled by individuals, sometimes controlled by collectives. But it doesn't exist in a vacuum...it always serves some purpose to someone, even if people don't agree on the usefulness of the purpose (i.e., resources used to drop bombs on the middle east is wasteful from the point of view of the taxpayer but useful from the point of view of the bomb manufacturer). Star Trek handwaves away the economy by saying they don't have money any more...but then they're constantly visiting "mining colonies" or transporting medicines to stop a plague that for some reason they can't just replicate on the infected planet. And while everyone has free energy and wants for nothing you can replicate they never explain how they decide who gets the ocean front property with a view and who's stuck inland. They say they've risen above concerns like "money," but basically everyone you see who isn't in Starfleet is still behaving like someone participating in an economy.
The only way anyone will ever launch themselves 10,000 light years away is if all the resources needed to do so are essentially free, because it serves no purpose to anyone else (no return on investment, no political/PR utility). By the time that happens human society would be so radically different that who knows what we'd consider important.
Also we could hopefully find planets that could support life much closer. A 10 or 20 year journey (from earth's frame) is still perhaps useful in human time spans. For a look at a future like that, have you read Alastair Reynolds' Revelation Space books? Very engaging, well-written books with fascinating characters and a space faring human civilization with as little magical physics as possible (i.e., no FTL*, 20-40+ years travel time between systems so the books span centuries).
* Well, there's one part in one book where they sort of try FTL but horrible things happen and it essentially breaks reality.