Any recommendations for article generation tool whre I can pay for single ouput if any?

Article Forge is is enough for quality it delivers in my case, but I need it just some times, so monthly billing it charges is too much, maybe there is an one time payment service maybe you know with same quality level output+- ? I could use fiverr or iwriter, but 10+$ for 5 articles each is ArticleForge monthly bill and it not instantly generated so I can't preview it,which is the key role in my case
Thanks a lot for pointing to an automated one if any out there or similar alternatives or suggestions how you solve this are welcome.
Bye!