We are going for educational tour to muktinath from college.
Can u suggest us trekking route stops and transportation availability if we wish to use conditionally and also about hotels, guest house along with the estimated expenses for a person for about 4 to 5 days trek.
You can reach Muktinath via bus from Kathmandu, but you have to change buses in many stops. Route for bus from Kathmandu is Kathmandu-Pokhara-Beni-Tatopani-Ghasa-Marpha-Jomsom-Muktinath and back.
As you said you are planning to trek, I assume that you will be trekking from Nayapul. Up to Nayapul you will get a jeep/bus. But from Nayapul you have to trek to Tikhedhunga-Ghorepani-Tatopani. You have to trek up there. Only from tatopani you will get a bus/jeep to ride to reach up to Muktinath.
As for the hotel/lodges, there are few hotels to stay, but depending on the number of people you are going, you have to prebook the lodge in order to get a room as there might be a chance not getting a room for 20+ people at once. So i advise you to book the lodge before, or you can hire a guide which will be helpful and easy for you.
Expenses depends on what you eat. Normally for one day, you can separate Rs.1500-2000 (approximately) for breakfast, lunch, and dinner.