WordPress themes and plugins website

Good afternoon,

I am interested in developing a website just like the WordPress Vault from Festinger. He created a unique plugin that people install on their website (or client’s websites) and it automatically can install 5000+ premium themes and plugins directly from their dashboard.

His website is: https://festingervault.com

Please browse the entire website to see if you can create such a website for me. The things I do like to have in place:

– Comparable design to Festinger
– Same hosting speed as his website
– I would like to know how his plugin is created and I do like to offer this as well to my client(s).
– I got a membership on their website, so I do like to use his library of themes and plugins on my own website as well.
– Dark theme
– Logo and website creation

Please have a look at the website and let me know if you can do that for me, and of course, for what price. I literally have no clue how much this should cost.

Awaiting your response,
Gerard.