Good question!
I managed to develop a No cost , Local Content Generator in 20-30 days using freely available AI tools like, Gemeni, ChatGPT, Codex . hashnode.com/forums/thread/i-vibe-coded-megamind-…
My take is - I could have taken less time if properly done.
Now what is Properly Done - Its more about providing guardrails to AI agent , a direction - rules in place helps - creating better strategy by focusing on steps of creation and testing -> and then start providing prompts step by step to build your app. It helps if you have a bit of coding knowledge.