Automated SMS and Email Reminders

I require a website, which sole purpose is to send automated email and sms messages. The website would be available to paying members who have individual profiles. Each person's profile would consist of a calendar used to schedule appointments (a car salesman would be a good example of somebody who uses this). I would require a form to gather data as set out below for each appointment being scheduled: 1. First/Last Name 2. Cell Phone # 3. Email Address 4. Date/Time of appointment 5. Appointment Location 6. Purpose of Appointment 7. Text field to populate with message to be sent via email/sms. Once an appointment has been set it would be saved into the users calendar. At a set day/time prior to the appointment (number of days/time yet to be determined but we can assume 1 day prior for now) an automated message would be sent to the person attending the appointment (both an email and SMS text message would be sent). The first job I am looking to have completed would be to develop a website capable of storing appointments --based on the above criteria and sending automated email/sms messages. *** SMS messages are to be sent via email, not an SMS gateway. In order to send an SMS message using email, the website must be capable of determining the carrier of the cellphone using just the cell phone number. Based on this design the user will not be required to know who the cell phone carrier is. I do not want a CMS used or a Microsoft Server. For bids to be considered they must contain a brief explanation of how you intend to accomplish the above project. If references or sample work is available please provide contact/website information.