Possible to disable HVM window?

[Rendov Norra]

I'm looking to have a daemon VM that serves files from my ZFS array to
other trusted VMs. ZFS is a bit of a pain on linux, so I was hoping to
use FreeBSD. I have no problems booting or installing it, but it
leaves a window open to the vga console, which is rather annoying. I'm
wondering if there is a way to tell Qubes to not open a window for
this particular qube?

I would make it a standalone Xen guest, but I'm unsure as to how I'd
get it to interface with other Qubes if I were to do that, and I'd
lose out on the benefits of it being a qube.