FYI you can buy this this: https://frame.work/products/framework-desktop-mainboard-amd-ryzen-ai-max-300-series?v=FRAFMK0002

And stick a regular Nvidia GPU on it. Or an AMD one.

That'd give you the option to batch renders across the integrated and discrete GPUs, if such a thing fits your workflow. Or to use one GPU while the other is busy. And if a particular model doesn't play nice with AMD, it'd give you the option to use Nvidia + CPU offloading very effectively.

It's only PCIe 4.0 X4, but that's enough for most GPUs.

TBH I'm considering exactly this, hanging my venerable 3090 off the board. As I'm feeling the FOMO crunch of all hardware getting so expensive. And $2K for 16 cores with 128GB of ridiculously fast quad channel RAM is not bad, even JUST as a CPU.