Build a Website

I want an education admission portal ,which intending students that need admission can only buy, fill and submit the admission form online from the portal by clicking "BUY PIN" then a page of the amount of the Form will appear which the student will pay for using his or her visa or master card to buy the pin from the portal and once the payment is successful a PIN will be generated and email to the applicants email and same time the PIN will also be display for a short period of time after payment is successful. then the student can now click another page in the same portal that will say " APPLY FOR ADMISSION " ON THAT PAGE the student will be given the access to enter the PIN generated and the page will then ok the pin if the PIN is correct and once okay then the admission application form will now display for the student to apply for that year admission ,the student will have access on the form to upload his picture and once completed the form and submitted ,the filled form will be saved on the portal and same copy email to two or three persons who is an authority of the school for record . I will also want this same portal to have a demo for test running for any intending school that need it from me to test run i. i also want the portal to be open to me that i can have access to edit and add context on it on year to year . and same portal to be able to create sa many domain names and hosting for various schools that need it from me.