I think about this a lot and it really does depend on your needs.
Home lab vs home server. I like to keep them separate just because I consider my lab unstable and my home server stable. You don’t have to do it this way it’s just the way I like it.
https://a.co/d/6k6QpOD If you want to build a low power NAS I suggest investing in an Intel n100 based itx Nas motherboard. You can then use a case like this from Jonsbo https://a.co/d/1ayqwJV. This could be a nice cool and quiet solution. If you want to do video transcoding, the n100 has quicksync on board and with something like Truenas it’s pretty easy to set up via the app catalog (check out truecharts).
If you want something even more simple (good for home users or like a backup target you keep elsewhere) I’ve been meaning to grab one of these “Topton 2-Bay NAS R1 PRO 12th Gen Intel N100 Network Attached Storage Media Server” from AliExpress for just this case.
As for a Lab, I suggest finding a W680 chipset based motherboard like an ASRock IMB-X1314 LGA 1700 Intel W680. You can get a cpu like a 12400 or 12500T (lower power and less heat) used cheap and you have the option to upgrade and use ecc memory without a XEON. You also have a lot more pci express connectivity.
What ever you do choose, anything pre 12th gen Intel is basically ewaste (those 11th gen mobile erying I9 engineering samples are very good but less reliable than desired). Do not invest in any old x99 based gear (unless you get it for free). I have an old dual XEON system that is still running and it uses power like a small fridge.
Depends on the usage. That’s the gamble you take. I would maybe buy three and put two in a mirror and keep the third one as a replacement?
That’s 240$ for three drives without warranty though… Nevermind I’d prefer to buy two new Toshiba X300 new for 210$ a piece and forget the headache and get the warranty.
Sometimes you get what you pay for … Sometimes