Even a 5090 can handle that. You have to use multiple GPUs.

So the only option will be [klein] on a single GPU... maybe? Since we don't have much information.

As far as I know, no open-weights image gen tech supports multi-GPU workflows except in the trivial sense that you can generate two images in parallel. The model either fits into the VRAM of a single card or it doesn’t. A 5ish-bit quantization of a 32Gw model would be usable by owners of 24GB cards, and very likely someone will create one.