I'm tired boss. Inpainting question

I've paid for both runware and krea.ai. None of these give me the satisfactory results I'm looking for. I won't rant about each product. But know I will just run down my credits with runware the I've cancelled the krea.ai sub after a few hours or usage. My end goal is to create a manga. I have already generated all the characters and so have the images for character consistency. I want to be able to generate the backdrop. Then mask up the areas where the characters go and for each one their pose, demeanor, expression, etc. Render each one until I get a completed image.