I have been using Home assistant OS (HASS OS) for sometime on my spare RPI3B+ as HASS OS was officially supported for RPI.
Now that it is becoming slow and my use case have expanded, I decided to try to port HASS OS for Khadas Vim1.
I used Odroid C2 image for reference and made changes to the existing C2 image with Khadas Vim1 support.
I present to you a test Image of HASS OS for Vim1.
Update:
A new dev build is available for those interested in testing the image.
This is from upstream developer, I have just build it from his repo with some changes.
Just keep boot partition in sdcard while removing all the other partition on sd card, then it should boot from sdcard and then load the rest from usb-stick/ssd/ if it have the needed configs enabled on kernel.
The above is theoritically correct and should work but not tested.
You can also just flash mainline uboot from Khadas source on sd card an have OS on usb stick and then check logs in uart to see if it boots fine.