Having 4+ years experience developing applications using PHP, MySQL/Oracle/MsSQL, AJAX, JavaScript, XML, I am confident that I can deliver all your requirements withing the mentioned time. The final delivery would be working perfectly. It will be secure from any kind of attacks (SQL Injection, XSS etc). Communication is much important during the development, so I would be available on IM, or by Phone, or by E-Mail, whatever do you prefer. I will provide 1 month free support after the deployment (in current requirements).
Hoping to hear from you soon.
Thanks & Regards