I am thinking of building a new NAS since I have outgrown my old OMV Raspberry Pi Backup NAS and I have enough of just drawers of old HDDs where I keep local copies of some stuff.
My main goal is to find a cheap motherboard / CPU combo; I don’t mind buying used, but I think I can write off new as business expense. Ideally I’d like to have at least 1 X16 slot for networking (to drop in a ConnectX etc if I decide to upgrade later) and 1 additional X8 or X16 slot to add an HBA, potentially even an external one as I might go with a disk shelf as rack mount cases with hot swap 3.5" seem hard to find here in Germany. Also DDR4 is preferred, since I have that laying around already.
I will initially have 4 8TB and 4 4TB SATA disks, and I also already have 4 8GB DDR4 sticks left over from my desktop; Any pointers are appreciated. I am thinking I need to go quad core or higher ideally, if I want to push above 1Gbit or later down the line, but it seems while AMD APUs are impossible to find cheaply, Intel has no decent cheap motherboards that meet my spec.
Happy for any pointers or ideas.