If you only have 8GB of VRAM on your VideoCard.
You could still be able to run it locally with the flux1-schnell-fp8.safetensors
Here is my simple workflow attached to this article.
You will need to download a smaller version of the flux : flux1-schnell-fp8.safetensors
https://huggingface.co/Kijai/flux-fp8/tree/main
Warning : the vae has changed it name to ae.safetensors
Some installation guidance to install flux schnell on comfyui :
download ae.safetensors (https://huggingface.co/black-forest-labs/FLUX.1-schnell/tree/main) ; copy it inside your ComfyUI\models\vae
download flux1-schnell-fp8.safetensors (https://huggingface.co/Kijai/flux-fp8/tree/main) ; copy it inside your ComfyUI\models\unet
download 2 files : clip_l.safetensors and t5xxl_fp16.safetensors from https://huggingface.co/stabilityai/stable-diffusion-3-medium/tree/main/text_encoders ; copy them inside ComfyUI\models\clip