Nice selections! I’ve been waiting on the 9800x3d for a while, expected it to come out early next year, but the future is now and I’ve also got an upgrade in the works. Still waiting on memory to arrive, but should be quite a bump from the 3900x I’ve been rocking since its launch.
I had a setup similar to this for a year or two that ended with an hdd destroying itself one night. Probably because of the drive and not the usb enclosure I was using. Until then it worked fine, it’s definitely a viable route.
If you can swing a desktop pc case it’ll probably end up easier and cheaper and have some headroom for upgrades, that’s the route I went down after trying an escalating series of mini-pcs and running into their limits one too many times.