Is there anybody running Kodi and Home Assistant on same PI? If so, which platform did you choose? I have read many articles but cannot find fresh information. If I understand correctly, there is still no way to install HASSIO + Kodi (HA only)?
It’s probably possible but why would you ever want to? The Pi is already a pretty limited platform and you’d be doubling the load - and worse if you install any Addons.
Suggest you find someone’s old Pi2 and run Kodi in that. Use a pi3 or pi4 for HA.
PI4 4GB should be enough to run them simultaneously. I also plan to connect an SSD drive.