The New Kesavaji Gaudiya Math is about 10 min. away from Navadvipa train station, which shouldn’t cost more then 10 rupees for the rickshaw.

Mr. Samit Biswas (the money changer on the map below) sent me this map. At his shop he changes US Dollars, UK Pounds, and Euros and can receive Western Union Money Transfers. He has an STD/PCO and internet shop as well which is open from 6AM to 11PM. He said he can book taxis to and from Kolkata, train tickets and book and reconfirm air tickets.