You kind of have to be rich in order to run these image generation AIs. The RTX 4090 TI isn’t cheap.
Any iPhone or iPad on the current version of iOS can run Stable Diffusion locally with the (free) Draw Things app.
Hell, if you’re willing to run on the CPU instead of the graphics card (which takes much longer) you can get Stable Diffusion working on pretty much any PC. And honestly any semi-recent nVidia card will have drivers to run it.
What’s more, there are free sites for SD image generation.
Image generation isn’t expensive, and it gets cheaper and cheaper every year.