How do you make a million dollars?

I built a tiny home, gave my sim the collectors aspiration, and joined the scientist career. Also had a garden. I bought a ton of easels and made a painting club. At level 5 career I could make the cloning machine so cloned my sim three times. Once my sim had completed a collection I could sell collectibles to the Simsonium museum. I started at 0 and took 34 sim days to complete the scenario. :)