A 5090 gets you 32GB with 1.8 TB/s of memory bandwidth for ~$4k, RTX A6000 gets you 48GB at 768 GB/s for ~$3.5k, 2x 3090 gets you 48GB for $2000 or so, and if you're willing to go into the wilderness, there are much cheaper options like the AMD MI50.
The RTX 5000 Pro 72GB seems like kind of a sleeper to me, and sips < 300W of power, approx 1/2 that of its big bro the RTX 6000. Kind of dream about installing it in a 10" rack, it seems like it might be able to work? @jeffgeerling you out there?
https://www.microcenter.com/product/709071/pny-nvidia-rtx-pr...