Please check Darjeeling trip budget here.
http://www.indiainfo.help/travel/delhi/darjeeling.
Find best hotels in Darjeeling here.
http://www.booking.com/searchresults.html?city=-2094056&aid=1461518&no_rooms=1&group_adults=1
This will help you for estimating your budget for travel to Darjeeling from Delhi.You can make your own Darjeeling tour package.This video also tells you about the Darjeeling tourist destinations.
