Can anyone suggest, or make for a good price, this script?

It needs to allow clients to sign up to the site, then be able to sign in with their user name & password, be directly connected to a schedule of all classes (50 or 60 different classes available, I think), choose all classes for the week or month that they will attend, and whenever that record is created or changed, the client & the company each get an email with the new info reflected.

No payment needs to be involved, they pay a monthly fee to take as many classes as they want.

Thanks!