I'm the best guy for the job. Let me tell you why.
First off, what makes the biggest difference between me and the rest of the bidding freelancers is that I actually enjoy coding – I started doing it just for fun when I was 17 and haven't stopped since.
Additionally, your site sounds particularly fun to code. It's the type of project that I wish I got every single day: It's challenging, unique, and requires me to use a wide variety of my skills combined instead of just 1 or 2.
Here's the plan:
The back-end will be PHP / MySQL powered. All the dynamic data (questions, answers, PayPal transaction IDs, admin credentials, etc.) will be stored in a MySQL database and handled securely with PHP.
The front-end will then be printed with HTML, CSS, and JavaScript; using all 3 in harmony in order for the site to look amazing, be snappy fast, and provide a beautiful user experience in all devices and browsers. As an example, the link to view all the answers to the question will be AJAX-powered, which means the page won't have to change or reload for the user to see the rest of the answers, they'll just be fetched and printed into the page dynamically.
The admin panel will be just as user-friendly as the front-end, while still remaining secure. It'll be responsive and easy to navigate and manage from any device that you choose.
I'd keep going but I'm running out of characters. Please contact me so we can further discuss your project and hopefully work together :)
Emilio Venegas