Hi Nishant

It is very difficult to get a hostel in that budget.
The hostel provided by the DU will cost around Rs. 53,200 per year which is very much costly then your budget. But it includes the everyday meal in it.

The PG cost in south delhi will also be costing you around Rs. 7000 to Rs. 8000 per month. But in this you have to cook for your food or use tiffin system. As you wish.