I agree with Ex-SD. Listen to Ex-SD, bugs and others who have seen the 1990s crash and have experience with declining values. Like Ex-SD suggested, look at redfin.com and sdlookup.com for price histories of houses 1986-1997 and 2000-2006. That will give your a good range of possiblities.
$750k will be plenty of money for that “forever” home you’re looking for in Encinitas.
Rent for at least 3 years and wait things out. Rein in the emotional desire to own and you’ll find a killer deal at the best price.
When people are positive and forward-looking, I’ve learned to discount whatever they say by 50%. People don’t have the income or the staying power that they project. Boasting is a human trait. I’ve been right every time.
As far as schools go, don’t worry about switching schools. Kids are more adaptable than you think. Change can be good and will teach your kids to be stronger.