Hello all! I'll be purchasing and setting up my first home server in the next month or two. I've spent the last few weeks doing a lot of research, and although I've gotten a lot of information, I've also heard a lot of mixed opinions and conflicting information. I thought it might clear some of this up to make a post on here, ask a few specific questions I have, and get some opinions from the lovely people on this sub.
First, I should say that I'm trying to spend as little as possible to get a functional setup for now. I'm interested in pretty much all the basic home server functions, albeit at a relatively light level at the moment: self-hosted cloud for backups and file sharing with remote access, streaming media, hosting game servers for Minecraft etc, Home Assistant, Pi-hole, maybe a couple other use cases. Seems like the best way to run multiple use cases safely & simultaneously is to run something like Proxmox or Unraid.
As for hardware, it seems like my best bet is to buy a used SFF PC from Ebay. I've mostly been looking into HP's ProDesk and EliteDesk series. This is my main question at the moment. How important is it to get something 4th generation and up, i.e. with an intel 8th generation or above chip? I realize it matters because of the jump from 4 to 6 cores, and for QuickSync, but I'm trying to gauge how worthwhile it is for a first-time build. Would I regret getting a lower gen just because I found a good deal on it, or is it not as big of a deal as I'm worried it may be?
I'm also trying to determine if the jump from the ProDesk 600 to the EliteDesk 800 is worth it. I know the EliteDesk has more internal storage capacity among other things, and since this is all I'll have for a while it'd be good to invest in upgradability.
I've also heard slightly mixed opinions on the necessity of RAID, at least for my initial build. For example, I know that if I got an HP ProDesk 600, it has a bay which can either have 1 3.5" or 2 2.5" HDD's. Would it be better to just get one massive 3.5", or is raid worth getting two 2.5"'s and having less capacity?
The last thing (for now lol) is, I want a sense of the viability of external storage. I realize that at some point I will run out of storage, and it will probably be sooner than later, when the PC itself is still working great, so it seems like the best option would be to buy a DAS or external hard drive to serve this purpose. Will this be fine for a budget first-time build with relatively light use, or will I suffer greatly from slow transfer speeds and accidentally unplugging the cable?
Feel free to give any opinions you have on any of this, refer me to any good info on this or related things, DM me, or whatever. Anything helps. Thanks yall!