I think I know what your product is and I think it is an evergreen niche. If you have a high cpp then you should sell it at a higher price and try to find ways to increase your average order value. I think you could sell your product at $30 to $40 especially if you brand your website, ad creatives and product nicely. If you are break even on your high ad spend days then you should get a positive profit if you increase your aov. I have been following your journey and your spirit is amazing. Keep it up don't be discourage.