I also have a feeling that the "40k to 250k EUR" to build this is a bit exaggerated. One ChatGPT/Claude subscription and the following can put together the described system, perhaps with fewer bells and whistles:
- OpenAI Agents API
- GitHub
- CI/CD
- identity system
- MCP/tools
- an eval suite
- a small UI
for one of our clients the amount of plumbing involved required 2 people working and tinkering for months with max subscriptions. I guess we're in the era of buildout and probably in 2027 the cost of software factories will be down to zero.