Did you set up your own infrastructure? I’ve been looking for a Heroku-like service to deploy some of these GPU intensive models
Otherwise, I recommend using runpod, lambda, etc for an order of magnitude of savings.
Crowd source services like vast.ai aren't reliable and barely less expensive than dedicated low cost providers.
If you don't mind ~30 minute one time setup you can get stable diffusion up and running incl. a nice webinterface on basically any cloud provider offering GPUs. I used https://rentry.org/GUItard as a guide and adopted it slightly for my needs.
As my desktop only has a RTX3060 I am renting a GPU instance on Genesis Cloud (billed by the minute and no cost while instance is stopped) using a RTX3090 with 24 GB of vram.