My understanding is that hba cards support virtualization better than passing sata directly through. But if you’re not virtualizing the NAS, I wouldn’t see an issue with a reputable motherboard that has enough sata ports at 6 Gbps.
For the cheaper expansion cards I’d see that as a central point of failure and would recommend an hba card over a cheaper alternative.
I’ll be honest that I haven’t watched his videos so maybe it ends up stable. TrueNAS basically says in their docs you can end up with weird issues.
If you host it in proxmox directly there’s less overhead, as in it’s not going bare metal > proxmox > TrueNAS > application. You might run into issues but honestly try it and keep a configuration backup if it fails. Pcie passthrough instead of devices for the HBA card and any external graphics cards works the most stable but you won’t be able to “share” those resources.
I personally like docker for most everything I can with a few things hosted within proxmox. I originally started with portainer which gave me a web GUI for docker but honestly docker-compose files are a better approach. So proxmox > debian > docker Proxmox > trueNAS and proxmox > other VMs. This has its own challenges like passing storage from the NAS to jellyfin but works for me.
As for components, I’m stable on an old office desktop computer potato (albeit it does hit some limits with file transfers and transcoding multiple streams). I wouldn’t necessarily recommend going out and buying an equivalent but if you want to mess around, don’t be afraid of not enough resources in a test config.
For #3 officially, nesting TrueNAS in another hypervisor and then using it as a hypervisor is not really recommended, especially with any kind of virtual drives. It could lead to challenges. Virtualizing drives is definitely not recommended and the most stable choice is passing pcie through with a hba card.
Given that, I have a similar setup and I’ve made backups for important data, I passed a pcie data/SAS hba card that I connect any TrueNAS drives to directly instead of a virtualized drive.
https://www.truenas.com/blog/yes-you-can-virtualize-freenas/
Those rules are for idiots and I’m not an idiot so it couldn’t possibly apply to me. I’ll just be careful.
/s
1GB is probably enough to run one basic service without a GUI. If you want anything more than that you’re going to probably end up running out of RAM and hitting the SWAP file–grinding everything to a snail’s pace. Useful projects here might be to add smarts to something dumb around the house or making an old printer support wireless printing via cups.
Like others have said if you want to tinker, a virtual machine via virtualbox or VMware is free for your use case.
If you strongly prefer hardware, an old PC will probably be cheap or free.
If you really want a pi you’ll probably have to look for something that has at minimum 4Gb (which will be easy to outgrow), recommending 8GB+. Note that raspberry pi’s run best on the official power plug as a USB-a to micro/c won’t provide enough power to be stable and will cause weird issues or crash the pi under heavier loads or when drawing power from the pins.