Anyone can learn to build something like this. The parts are all available out there. There's Whisper. There's Mistral-7b. There's Tortoise, Coqui, SV2TTS. There's Python.

The bigger question is:

Would you want to?

I've been building web apps for several years now. I've sunk thousands of dollars into those projects. And literally years of my time. If I calculated my hourly wage, I'd be below a teenager mowing lawn. In Rwanda. And by a factor of 10x, probably.

The real ROI here is the learning. And that's not something I'm "taking" from anyone.