The 2008 GDP of Gaza (including the West Bank) is estimated by the CIA Factbook to be US$6,600,000,000 (at the official exchange rate).
https://www.cia.gov/library/publications/the-world-factbook/geos/gz.html
The pledged funding stated in this article is US$900,000,000.
This works out to approximately 14% of Gaza's entire GDP!!!.
Talk about jump-starting an economy.
This is large scale (terrorist) nation building.