Hey, I watched your video and before I'm going to state my plan, I would like to introduce myself first. I'm David, one of the experienced Web Developers of CodeAxisPH. I see your project very interesting and I'm very excited to work with you.
So for my plan, I would like to create this from scratch with a different framework (not Wordpress nor Joomla). A framework that is very suitable to the needs of your site.
By the way, for the price of this project, I would suggest to make this as an hourly project. My hourly rate is $20USD per hour. If you want to work with me, feel free to contact me in here. Wishing you all the best! :)