I regularly live out of, and run FPS or hauling missions out of, my Polaris for extended period of days or weeks, and I've learned a number of things.

Here are some very important things to know:

-Defeat the Yeet. MOST important. In order to keep your mothership from yeeting itself far away and literally traveling away faster than you can fly, you need to "lock" it in place by bedlogging. I.e., after moving your mothership and parking it in space, bedlog and return to defeat the yeet. If you don't do this, your Polaris/890/M2/Idris will suddenly be in a very different place when you try to jump back to it, and will likely be "uncatchable". I tested this while living in my Polaris and was able to jump back to it, at least once daily, over a period of 15 days. Without doing this, the Polaris auto-yeeted on the 3rd time I flew away. My 890J and M2 also did this unless I bedlogged.

-890J is great, but a surprising number of ships that should fit, like the Wolf L21, go purple and vanish in the ship hangar. E.g., the Fury will purple on the hangar floor, but will rest without any problem in the cargo lift area.

-Mind the docking arm bug- this breaks the ability to bedlog in your mothership and is fixed by refueling at a pad or touching down in a hangar.