Joomla SOBI2 Directory Extension to be linked with Events and SMS-ability

Hi, I am busy developing a joomla site with a directory of artists. I am currently using SOBI2 for the directory. I want to add a service to the site that will send registered users an sms when their favorite artist is performing in their region. Thus: -The SOBI2 directory entry has to be linked with the events extension (eg. GigCalender, Eventlist, doesn't matter which one, the developer can choose) -The user should be able to sign up for an artist's sms's thus the directory entry should some how be linked to the users profile (I use community builder for the user management) - The user should be able to pay for the service somehow