I would trust your father's advice. He has been through 2-3 real estate cycles. I know of a couple families in CA and NY that have bought and held for 20-30 years and every downturn, they picked up properties. They have healthy portfolio of properties. I am surprised that your father hasn't shown you how to find these cherry deals. Deals are out there, you just have to uncover them. Work your network. I think a good play for you would be to find multifamily zoned properties that can be fully rehabbed for value add options. Since your father is a developer, then it should be easier to do than the average investor. Follow his lead and put in as many low-ball offers that you can until a few get accepted.
I would avoid investing out of state, unless you have family or friends that can look out for your best interest. As other CA investors have mentioned, investing out of state is where CA equity goes to die. Market is hot now since investments and job market are stable, but it is hard to predict when the next downturn will be. If you find out the time and date, then let me know. Look up Robert Campbell and Bruce Norris for their predictions on the market. The problem with investing in a downturn is that most renters will have trashed credit and job market will be bad. It takes time to wait for the appreciation to build. Another recommendation is to look up member Swanny's story on investing in SD downturn and going from school teacher to full-time investor with apartment complexes in OH.