Hi, I can create website using Wordpress CMS, We can complete the website within 7 days using the plugins provided by WP.
Membership implemented using s2member plugin
If any social media type features are required, can be done with buddypress plugin
Can use any theme you suggest. If we use premium themes, it will have support for above said plugins and will have a good UI. So no time will be spend on creating UI.
If agreed, please contact me.