Hardware for AI generative videos to live music

Hello,

I will use stable diffusion or some kind of AI generator for live music.
I saw the fps are horribly low using that. I need a new laptop anyway for that.
My Budget is ~3150 € to have a RTX 4090 and intel i9. Any suggestions for a hardware to do this?
Or what do you think are the System limitations for that kind of generative art?
I’m very new in TD and want the opportunity to use all functions of TD at some point with that Laptop.
I would aprecciate any suggestions for cheaper solutions a lot!

Thanks!