I just completed a similar project,but for another country(Kenya).I therefore have the structural knowledge to design the infrastructure for this system.
The android app of the system is in the play store,but only avaiDaha Fazla
Amra Ekta Bangali Company :-) from Kolkata
Quote - INR 7,50,000 ( 7.5 Lakhs)
Duration - 6 months
Not included - Domain, hosting, SMS or any other Financial Gateway charges etc. Only development cost quoted.