The cost for israel has been profound, from arrow interceptors to BM and CMs launched from jets in Iraqi airspace all cost millions each. Deteriorating iron dome, damage to infrastructure, psychological strain on the zios, all within 12 days is very telling. As i mentioned a long time ago, israel does not have the industrial base or capability to sustain a war longer than a month.
What is also telling is the US partially turning its back on israel. In the past, it was unthinkable to see israel cities hit daily and consistently without US involvement. Now we see israel on their own (for most part).