Coupon micro site with php / mysql

I need a website, where our customers can type in a coupon code, that they found on a postcard, to get a voucher. Our aim is to generate qualified leads. We created 30K codes, which will be printed on postcards soon and would like to create a website, where our customers can type in there voucher. Step 0 will be, that I provide you the 30.000 voucher codes and all grafics that will be necessary for the microsite. Afterwards you have to import that codes into an mysql database, set up the microsite and make the php, which will be used to check the vouchers and send the lead data to our e-mail address work. Step1: If a customer types in a wrong code, he will receive an error message, telling him to call our companies number, if the error still occures, to get a new voucher code. Step2: If the customer succeds in typing in the correct code, he has to type in some personal details within a contact form. This form entries will be forwarded to our companies email and he should receive an autoresponder. The voucher he used should be marked as used, so nobody can use it anymore! Step3: Customer will se a "thank you" page. Any questions, please don´t hesitate to contact me!