I don’t think $5M would get me my dream in 92091 or 92067 so I would probably just build on a lot I already own in 92064 and save part of it to hire a live-in housekeeper.
I’m not sure zip code, by the way, tells the whole story. There are corners of some zips that some folks never see that are a world of their own; The Heritage in 92064, for example.