Since I opted for initially completing the Painter Extraordinnaire Aspiration I gave my Sim the following traits: Creative, Art Lover, and Perfectionist. Choose traits for the Fabulously Wealthy Aspiration based on how you will earn your money. If you choose a Fortune Aspiration right out of the CAS gate, then your bonus trait will assist you in earning a little more money from careers - but, in the grand scheme of needing to earn $200k for the Aspiration, it's negligible. I did not jump into the Painter career until he had the Connections reward to allow him to start at lvl 4. I chose this route along with the Painter Extraordinnaire Aspiration in order to assist in accumulating Satisfaction to purchase helpful rewards like Marketable and Creative Visionary. Your other option is to kick off your Sim's initial development with a different Aspiration tied directly to their money making. If you start the Fabulously Wealthy Aspiration from scratch - i.e.
Give painting serious consideration since it is one of the best skills in the money making department. The Sims 4 Fabulously Wealthy Aspiration Milestones and The Shrewd Reward Trait by Tom 'Metro' Schlueter Earning $200,000 for the Fabulously Wealthy Aspiration is no small feat.