I’m definitely sure it’s saving me more than $140 a month to have CI/CD running and I’m also sure I’d never break even on the opportunity cost of having someone write or set one up internally if someone else’s works - and this is the key - just as well.
But investment in CI/CD is investing in future velocity. The hours invested are paid for by hours saved. So if the outcome is brittle and requires oversight that savings drops or disappears.