The village kasol is super hyped and is too expensive for the middle class and students. It is basically a stoners paradise and * was* also a ravers home. But now there are no parties as they were banned in 2017. The best place to visit is kheerganga which is towards manikaran and if you are a trekker you can furter go to pin parvati.
Comming back to kasol the best way to travel is walking or bikes as roads are conjusted. You will get cheap hotels towrda chalal which is ha nearby village 20 min away and also in tosh. You can go to nearby places like malana and if you just wana go for a hike rasol can become your destination.
Food: 100 rs thali minimum sufficient for onw perosn.
Cheapset trip can be under 6000 for more details you can reply back and ask me.