I’ve seen estimates of sub $1,000 for the Qassam rockets and $50k for Iron Dome interceptors.
Ouch.
500 to one cost ration is prohibitive. Hamas could bankrupt Israel with big enough salvos...
The Israelis should just make the Gazan Arabs pay with their lives and massive infrastructure damage. And they should cut off power, water, access to medical care, etc. And, for Heaven’s sake, don’t give them any more money!