There are 75 districts in Nepal.
How many VDC? It is here http://en.wikipedia.org/wiki/Village_development_committee#Achham_District

How many INGOs ? It is here http://www.ain.org.np/member_ingos.php
How many NGos? countless

If only one INGO or NGO is working for each of 75 district, there are plenty of INGO and NGOs. Kathmandu would not have been  flocked with villagers.
Most of the money goes to high salary of employees.
All INGOs and NGOs concentrated in Kathmandu. Take all those offices out Kathmandu and save some rent money.
Kathmandu is booming by INGOs and NGOs money.