Fitness Website Rebuild

I have an existing website https://www.energizeme.fitness. The site is a membership subscription website for our fitness videos and services. We have build the current site in Wix and have integrated ActiveCampaign for list management. Unfortunately Wix is too slow and the website speed is atrocious.

Therefore we would like to rebuild the website in either webflow or wordpress. Videohosting will likely be in vimeo. I also like Memberstack as a membership management option for webflow. However I am not sure what the best options are for membership management in wordpress. I am happy to be advised by you on the platform details.

The key requirements for the new website are:
- replicate existing website content and function
- deliver a membership website where we can restrict access to our videos and members only content
- deliver excellent speed as measured by https://developers.google.com/speed/pagespeed/insights/
- develop high converting landing pages for our services
- deliver excellent UI design
- must be mobile friendly design

If you think you can assist us with this project I would be happy to hear from you with regards to :
- details on what you can deliver
- how long it will take
- how much it will cost
Thanks