Get yourself some old cisco 3600 re-flash it with standalone firmware and get enterprise class WAP for cheap.

Just weight your risks. Old drives can fail early, and enterprise drives consume more power. Old drives probably not for mirrors or RAID5. RAID6 and spare HDD on shelf may save your data one day. It is a lottery.

Thank you. Intel now offer ECC on top processors like i7 and i9. It is a news development. Now biggest problem is to find motherboard supporting ECC.

could you please elaborate? what is SFF hardware?

Just get VPS and use it to bounce traffic between nodes.

Ethernet is not a problem. Plug USB-to-Ethernet adapter to your phone ( there are some requirements to both) , and you will be surprised.

Is it tame for selfhosted to switch to DANE?

could you post a photo somehow?

How does fiber termination looks like? If something like that https://www.markertek.com/productImage/HI-RES/932-153-1D2.JPG you can by extension cable.

It is just a imprecise bunch of JavaScript. There is no need to host it, you just need to get into your browser.

I use QNAPs for literary decades. I'm now in my 3d one. I love that they supports their devices for long time. But their software is getting more features, but quality IMHO is going down. I would now build NAS myself and not buy QNAP. Not having option with ECC RAM is also disappointing, but probably ok for home usage.

zfs dkms on debian prompt to be non problematic for me. ZFS is standard storage back-end for our docker swarm hosts, and I have plenty of them. Same DKMS work fine on my desktops too.