All of it functions and duties become the financial responsibility of the Israeli Defense Forces, the Occupier. From Education to hospitals to schools to housing to fire protection. And the Israeli taxpayers get to pay for all that, unless you can talk the US and EU into picking up the tab, as we have been since Oslo. How you come up with the extra annual billions becomes a worry to sweat over. Paying for your own occupations can hurt anybody's economy.
Israeli teen lightly wounded from stone throwing in West Bank settlement of Kiryat Arba (Haaretz)