I have a Drobo 5N for file server use. It has been great because it is very small and doesn't need a keyboard or monitor for me to use it. I can install/reset/manage the device fully from another laptop.
Now, I'm looking for a home server that does more than just serve files. I can go with a Synology 1517+ which also needs no additional hardware and has more functionality. But, that functionality is limited by what DSM offers.
I can also go with a DIY NAS. I would be basically building a computer in a case that can house many hard drives. I can then install whatever software I want, but it comes at the cost that I will need a monitor and keyboard for the install, and then always need to keep the monitor and keyboard around in case something goes wrong, and I'd like to avoid this. I'm going for minimalism here.
Is there any way I can build a DIY NAS with just the computer and no connected monitor & keyboard? A KVM over IP device might work, but seems pricey. Any other options?