One wonders how many they can handle simultaneously?
When there are too many missles flying simultaneously, the Israelis will have to put a stop to the flights at the launch sites. There will not be time for surgical strikes. Israel will use a limited version of its Samson Option (nuclear weapons) to destroy launch sites in Damascus and Jordan. However, with Jerusalem potentially being downwind from Gaza, it is more likely that they will carpet bomb Gaza with conventional weapons.
I expect the war to begin before summer.