Hey Gaurav, After reaching Kasol cross the bridge and walk for 10-15 minutes toward Chalal village. There you can get a good room with hill view in Rs 500 for two persons. Another option is to stay at camps by the side of the river. Happy travelling!!!!!!!
Hey Gaurav, Here are two cheap and most reputed dependable hostels for you:- 1. The hosteller Kasol - The Hosteller, Near Kasol Temple, Old Kasol, Kasol, Himachal Pradesh 175105 https://thehosteller.com 09810187717 2. Nomad's hostel Kasol - Village Chojh, Chojh Bridge, Manikaran Road, Kasol Road, Kasol, Himachal Pradesh 175105 http://nomadshostels.in 07807909245 Happy and safe Travelling Bro!!!
Pre-booking is never an good idea if you want to save money in staying. directly go there. you will get plenty of rooms for travelers. you can bargain for the cost. Regarding staying in Kasol, you can get cheap rooms in Chalal which is half an hour walk from Kasol because Kasol is crowded. and Chalal is a perfect place to stay if you want a getaway.
So Good Luck!!!