I like that idea a lot though.
It makes total sense and actually goes quite well with what I've suggested in the first post. Breathe more life into those other planets that way. I really really like it.
The idea of a home base just makes me think of downtime in a P&P RPG: I don't know where the BBEG is, but look, I found a mine over-run hideous nightmare creatures and I can make a cannon that fires sunlight. Shall we?
Additionally to having a home base for 'storing' companions, a more in-depth version could have your companions temporarily or permanently leaving your service and parking themselves on a planet or joining a cause (like Torian going back to the Mandalorians or Kaliyo going... away.)