Buying few-year old enterprise gear can be a really cost-effective way to get a ton of power and expandability. But the noise, footprint, and power requirements seem pretty niche, even for homelab/selfhost people.
But I’m curious if you’re talking about a full-depth rack system like I’m assuming, or something else.
Personally, I switched to a handful of very small-footprint systems (mostly NUC/SFF PCs, and some laptops). And use cheap jbod enclosures when I need to add external storage.