Few points here:

• You can also automate the captcha solving as IRCTC capthas are not very complicated. Probably using the Tesseract model itself should solve it
• IRCTC has now introduced Aadhaar based authentication to avoid bots booking tickets. Hence, a lot of agentic booking that was blocking lot of tatkal tickets and then resold in black will be avoided.

Your idea should still be able to grant a competitive edge to you when compared to other users.