Gotcha, yeah, physical space was the main thing I was worried about picking up one of these used corpo boxes.

Would something like the HP DeskMini mentioned in another comment be a good enough choice for a service hosting machine?

I have an old, pretty big Antec tower from like 10 years ago that should have plenty of space for drives - I suppose I could reuse that for the NAS and just upgrade my main PC case to something more modern like I already wanted to do anyway.