@JMY1000, Intel Macs. Thanks for the advice. I wasn't aware that eGPUs don't work on Apple Silicon. Although my Macs can support eGPU as you say, it seems like a Linux server would be the better option at least in performance--that's what I had previously assumed, but I'd never seen any actual statistics. I'd love to see how it would compare to using an eGPU in terms of benchmarks. My command line and Linux knowledge are decent, but looks like I'll be needing to improve them...

Yes I should have been more specific by mentioning the price of the products. And yeah it's overkill for the OP's system. But still a good option for those looking for a dock that can support multiple monitors, if they are less financially resource-constrained.