Say a comet comes down from the sky and destroys the cloud and you need to completely rebuild Clarity.fm from scratch, including all existing features. How would you go about doing it? What frameworks and programming languages would you use? How much would a project like that cost? What features would be the most costly/time consuming to build?
I would hurl myself toward getting the following working first:
* User signup (default to user)
* Profile setup (photo, etc).
* Add Stripe information
* Make it easy to share the link to my profile
* Enable Expert-mode, to answer phone calls
* Enable Twilio for calls
* Set Hourly-rate for calls
* Build/program API to handle conference calls etc
* Connect to LinkedIn / Facebook / Twitter for 'verification'
Other than that, Clarity is very well built as it is. I'm sure you're trying to build this for a specific business.