Help me plan a budget trip to Darjeeling.

Im planning a trip to Darjeeling with my college buddies, but we've never been to Darjeeling despite living in WB. So please help me in cooking up a trip. Our budget is strict; we are a group of 4-5 people with a budget of 5k per person. We plan to go on 1st May and end on 5th. Any help/recommendation is appreciated.