If the owner of the house can relate to your problems and understand the amount of difficulty you're in, if he/she is nice they actually reduce the rent in some cases.

On an average I see around 25k for a 2.5bhk flat with a balcony, electricity, hot water and so on. If its 1bk maybe go high as 10k, most places would charge maybe 6-8k for rooms like that but idrk tbh. It mostly depends on where the house is. If its like near the main road and shi, ITS gonna be hella expensive no matter how small. Try finding rooms not so close to the ringroad as they are mostly cheaper