I bought a used gaming PC as it was a very good deal but I have to change a few things including the motherboard (I posted about this in the building advice subforum a while back). My new board (+cpu) should be in the mail tomorrow so I'll be setting up the rig in the upcoming days.
Regarding the RAM, I have 2x32GB of DDR5-6000 CL30, I'll see how it goes.
I think, I remember your thread about your new system and probably added some rambling thoughts over there as well.
64GB should be good as stating point, especially if you are using a proxy workflow and don't work the YouTube influencer way that requires Threadrippers and 4090s to edit out their "uhm"s and "ah"s.
That said, after you sorted out your storage, upgrading your memory might be a good idea once 64GB DIMMs become available. Also try experimenting with "optimized media" and "proxies" in DaVinci Resolve. While both do essentially the same thing, optimized media might generate less written data to your cache drive than re-rendering or re-muxing (do other people also call it that?) large DNxHR containers. Personally, I'd keep an eye on the total host reads and writes in HWiNFO in the first couple of days and weeks. Personally, I wouldn't be surprised if you were massively over-estimating your drive writes. Originally, it sounded a bit to me that you were running hundreds of GBs of footage every day through your system for digital dailies.
On a side note, remember using a copy tool like
Teracopy or something similar that copies your footage by actually verifying it. One of my previous employers even decided to develop their own copy tool for film footage, because Total Commander was too clunky for most of my co-workers.
Over the years, I'm sure we lost more valuable data from people's mistakes of handling data than from actual hardware failures.
Regarding SSD endurance, not sure if you are a German speaker, but some of the older German computer magazines did a lot of articles about SSD endurance with long term testing in the early days of MLC and TLC SSDs. I think you can still find the old articles from heise.de and computerbase.de that reached crazy high amounts of NAND writes. There are also a few old articles in English from Tom's Hardware and AnandTech, but the German magazines back then seemed really, really obsessed with testing write endurance.