Yes. It's extremely difficult, if not impossible to cash flow in many parts of California on 1 - 4 unit properties. But if you are going to live in California and it's feasible for your lifestyle, house hacking for your personal residence can significantly decrease your living expenses. Depending on how long you house hack, eventually it can cover your housing expenses. Of course, you can then use the savings to invest in out-of-state properties.
We are BRRRR investors and have completed everything but the Repeat. We are a year into our first property in Indiana and are actively looking for our second property in Indiana or a few other markets. If you haven't read or listened to them yet, I'd highly recommend Brandon Turner's Rental Property Investing, and David Green's Buy, Rehab, Rent, Frefinance, Repeat and Long-Distance Real Estate Investing. These were the 3 real estate books that brought it together and helped me finalize my strategy. I'm actually listening to them again right now as a refresher.
Hopefully, you find this helpful. Don't hesitate to reach out if you want to know more. It's still early our investing career but I'm slowly making progress while running my business that is not related to real estate.