This is something I worked on for a while,.. I had a 1U server I could use, but it only had slots for 2 drives.... something I thought was 'risky'.
I looked at getting a heavier box something that could take up to 8 drives,.. but boiled things down to getting a ReadyNAS 314, 4 bay with 2TB drives.
IT's been running fine, have a few shares on it,.. permissions and attached a 1TB external USB drive as well (already had).
Small form factor and serious lack of ambient noise makes for the win...
ETA: I credit research and speaking with @scottalanmiller and ML for insight on it.