I run oobabooga's API on docker with a 13B 4bit quantized model. https://github.com/oobabooga/text-generation-webui
We use GTX 3060s because there the best bang for there buck in terms of VRAM. Our current set up is mostly proof of concept or used of inner office work well we work on scaling to get a fluid handler built so it can distribute workloads around the multiple GPUs.
Lucky the crypto mining community laid the ground work for some of the hardware.