There is a lot of great advice here. Safety reports and alerts can be set to your emails. Also, San Diego is a big place. Are you available to go drive through a bunch of zip codes to see what they look like. Because there are beautiful homes in some of these zip codes, especially with the market now. I would not want you too miss one because of a crime report alone. I usually take my clients to the home in the day, we go back at night and I usually recommend for them to knock on the neighbors doors with me and we get a LOT of info from the locals. This is really the best way because it comes from someone who has been there a long time.
Lastly, if it is a rental for you it may not be a problem with tenants. Call me and let's see! I love finding new gems!
Check out my website too, I work with properties that are not on the MLS !