r/abacusai

So, I just tried to make a video for YouTube by using AI(I used abacus AI) and made it generate everything like scripts, narrations, and pictures. But because I needed many pictures, I ran out tons of credits rapidly and spent pretty much on purchasing extra credits. So my question is how do those who make fully AI generated videos, like zenn or whatly, deal with this problem? They are posting such videos almost every other day but it seems impossible due to lack of credits. They just pay for them every time they run out them? Please advice me.