Have you looked at zVault at all?

https://zvault.io/

Yes, I had been following vault.io for a few months, but I don't think it is ready. My understanding is that vault.io faces similar limitations as TrueNAS and ZFS. So, I hand-built FreeBSD, OpenZFS, Bastille, and Samba how I want it and learnt a lot along the way, and I am very happy that I did. It didn't take too long to transfer from iocage to Bastille.