Here are a few options for accomodations you might want to try:

Paradise Guest House, IIT Powai.
Tariff: INR 500 per day per person
Date of check in: 29th Jan, 10
Date of check out: 31st Jan, 10
Contact person: Mr. Bhaskar ( 9833638355 )

Address:
Paradise Guest house, Next to Jain Mandir, Jain Mandir Road, IIT Market, Powai, Mumbai – 400076.

METRO RESIDENCY,
OPPOSITE POWAI LAKE ,
NEXT TO RAMBAUGH POLICE STATION
RAMBAUGH, POWAI, MUMBAI- 400072
TELEPHONE :   022- 30556677

Tariff(Approx):
Rs 2000/- net on twin sharing basis
single occupancy dlx room – Rs 3000/- net
double occupancy dlx room – Rs 4000/- net
The room tariff is inclusive of all taxes, airport tranfer,complementry breakfast.