Slack app with Facebook API integration

We are looking for someone to create a Slack application, that needs to collect Facebook comments from all selected Facebook pages, through Facebook API and display them in selected Slack Channel (Chat). Inside the chat, we need options for every comment (Delete comment, Hide comment, Block user, Sent reply, and send Direct message.) and send this information back to Facebook API. We would like to sell this application, as a subscription model, charged on the number of monthly comments get. (If the user gets 1000 comments, they will be charged 5$ if they exceed this number they will be charged 10$ for additional 3000 comments.) Additional features: 1. We would also need the option of “quick replies” - an option where every user can create their own “quick replies” to reply to any of the comments received. 2. Translate comments - we need an option to translate all comments to a selected language (in case comment is written in any other language then selected) 3. Delete all previous comments - We need an option to delete all previous comments, so users can start fresh. We are trying to create something similar to Shieldapp .io (You can try, it is free.). If there would be any features that are really complicated to develop, please let us know, we might have some solutions or can adjust some features to make it easier to make. Please let us know the estimated price of this software and what do you need from us and what is the estimated time of development.