Hello there, my name is Ebrahim Mohammed, I have been a programmer and a web designer for over 5 years now with a lot experience in HTML,PHP,ASP.NET,MVC,C#,C++,JS,CSS and many more languages, not to mention my experience in MySQL,SQL,JSON,Text based databases. I have took a look at the complete description, and to be honest, even tho you expect it to cost 600$, I expect it to cost 250$, however for sure, in case you added extra work you can pay extra money :).
Please take a look into my portfolio and some of my reviews, and good luck deciding, anyways I am sure that I will never let you down :)