WOW!! This is one of the most innovative ideas I have seen. Students and parents getting engaged in supporting school through volunteering to work in farms for school is awesome. This actually makes the students very aware of the job that employs about 80% of the population in Nepal.
I have heard there is a similar school in Argakhanchi where the school has farmlands and funds in banks and it discounts the students heavily based on its income from the farm and interest received from funds in bank.