In the MCU? He hand built multiple suits, and designed all of the others himself. It even states that he designed his first engine when he was like 4 I think in the first movie. He was worse at creating AI than his actual mechanical and electrical engineering skills, as portrayed in the films. Comics are of course a separate matter.

Wow what wonderfully ignorant advice. “If you don’t have enough money, consider having more.” The majority (not just “a lot of people”, but literally more than 50%) of Americans live paycheck to paycheck.