Well unless you are capable of coming up with no energy input cost effective desalination. If you do the Saudis have a palace with your name on it and all the beer wine and women you would want. (They keep the sexy goats and camels)
california has more stare than SA We have a large mouton chain you may have heard of that has a snow pack. In Carlsbad we opened a deal plat a year ago and it provides 10% of the water for SD county. Just need 5-6 more and NorCal can take care of itself and send less to soCal.
Water is not the reason California should exit.