Mine is more an exercise in if I could than if I should. I’m using a 1tb disc for os and cache with a thunderbolt, 4 disk jbod nvme enclosure for storage. If I was in need of more storage I’d probably go with a usb jbod ssd enclosure for power efficiency reasons but as is a bit less than 5tb has been fine for my needs.

Subarus are pretty easy to kill, the telematics unit sits under the head unit and comes out in about 15 minutes, 30min and a $60 harness total for the job

Yea, I did. When you start modifying configs and writing shell scripts git can help you track those as well.

Seems solid enough of an outline. My only note is I highly recommend git first, you don’t need to be an expert or anything but if you understand the basics and use it you will never lose a line of code and be able to lookup historical changes to find issues faster. Then when ready you can stand up a simple git server like gitea to host those repos and collaborate.