buy with a like

Hello we have created this site [login to view URL] but we have to change payment mode. The system works : -at the moment the system create ticket -an user buy a ticket -payment with paypal -when a ticket is bought is disabled -the ticket is linked at the user email -when all ticket are sold i extract a winner for the item. I REQUIRED THE FOLLOWING WORKING. - create a PLUGIN -there is now facebook button access -an user arrive on growticket -log in with fb button(existing) -the user must be fan of our page(existing) -the user can do 2 things -buy 1 ticket x 1 item in advertise . The ticket must be linked at the user email -if there are 10 item in the page the user can bought 1 ticket for all the item -the user can push the "start new grow" button and create its advertise eg: user 1 log in with fb ->becoming fan(of growticket page)->public an advertise and the system create xx ticket user 2 log in with fb->becoming fan(of growticketpage )and fan of user 1 fb fan page->buy 1 ticket with 1 fb like from user1 when all ticket are sold the user1 extract the winner for all the ticket of its object(existing) EXISTING PARTS: -fb login -system for create the ticket -extraction system TO DO: -change paypal payment with fb like only 1 ticket x 1 fb like -link the ticket with fb user email eg ticket 1 :xxx@xxx. -sell only 1 ticket for 1 fb like -user 1 must be fan of user 2 page for bought the ticket eg :user2 click on ticket->click "procedi" and if is fan purchase the ticket otherwise open pop-up with the message "you must be our fan with the link at the facebook page" Budget 150€