If it runs on 4090, it also runs on 3090 which are available used for 600 EUR.
I am hopeful that the prices will drop a bit more with Intel's recently announced Arc Pro B60 with 24GB VRAM, which unfortunately has only half the memory bandwidth of the RTX 3090.
Not sure why other hardware makers are so slow to catch up. Apple really was years ahead of the competition with the M1 Ultra with 800 GB/s memory bandwidth.
It works but the tokens per sec is very slow. It did complete a TypeScript task example succinctly.