a word of caution: Nepaliharusanga basdai chhau bhane ramrosanga bichar gara, most are selfish and fall in one of those 3 categories furke pointed out. 
ma khaira harusanga baschhu, 6 people in a 2 storey house and here are my monthly expenses:

Rent: 250 includes everything - internet, electricity, water, garbage, TV, etc
Food: ~ 100
School: ~ 125
Cell: 30
Health Insurance: ~ 80
Misc: ~ 50
Transportation: ~ 75
Gym: School gives for free
(No Car > No Gas > No Auto Insurance)

Again: beware of nepali room mates, they might not be as good as you expect