Hello,
I have extensive knowledge of PHP and used to design lots of different systems. I can create a helpdesk system with all your requirements in 4 days as long as you agree to work with me.
Do you want anything else except what you described in the job requirement? If yes, we will have to talk about pricing and time requirements, if not, my bid and time stand as they are.
If you want to see some of the past projects, look at my profile.
Kind regards,
Nick