I stayed there for nearly a month. In case you are provided with free stay, you can easily manage under 2000 CHF for the month and around 2750 for 2 months. Ticket 650, Train 50, Taxi 30, Food 350, Stay 400 month, Local transportation for Sightseeing 350 for the month. But the experience of bringing those changes and contributing to society in large is TRULY PRICELESS.