I can’t help but thinking that you are exhausted from waiting for the last 5 years. And now, there is this seemingly “incredible” opportunity that knocks. So, it’s understandable that you want to make a leap.
In today’s market, where real estate is a depreciating asset & lenders are tightening credit standards, cash is KING. There are many desirable areas in SD county with ocean views, I wouldn’t worry about the lack of buying opportunities 15 months from now. If anything, there will be more opportunities/bargains next year.