For the house you want: 2800 square feet spending 600,000, that ‘s 215/sf.
For Del mar, I see a range of 400/sqft to 2052 dollar/square feet for 2800 sqft homes.
Footnote: for the 400 dollars/square feet above in del mar, I see that house listing at $1,290,000 now.
There are plenty of rich people. They won’t move anywhere so that you and I will be able to move in. The crash will basically affect the upper middle class areas, middle class and poor areas.