And then it was a goodbye to Parvati valley.!
Entire trip costed me about 6-7k Rs (travel charges excluded)
Kheerganga trek during winters is a bit risky one but definitely possible and worth the risk. would recommend to take a guide with you.
Enquire about the camps in Kheerganga before you head up.
Temperatures may some time touch negative 15c so be prepared for it.