Travel in local bus and you can stay in gurudwara and have meals over there. There are gurudwara everywhere
Rishikesh
Joshimath
Govind ghat
Ghangariya
Hemkund Sahib. ????
Hi Nanu, it will cost you around Rs. 10,000. Accommodation is rare and expensive. I have attached two hotels which are close to the Valley of Flowers National Park. You can get meals in these hotels.