35c/hr seems crazy expensive compared to Midjourney. Midjourney gives you set fast hours (Immediate GPU) and unlimited relaxed hours (Delayed GPU). It also has a lot of built-in parameters you can use to easily tweak images. I'd rather pay for MJ than run my own SD.
The main upside of running your own SD is that you can completely automate it, but I'm not sure how useful that really is.