Dynamics, Pipedrive, Zoho, and HubSpot plugins development

I’m looking fore somebody who will build marketplace apps /plugins. A company operating in SaaS model already has a Salesforce marketplace app but wants to enter Dynamics, Pipedrive, Zoho, and HubSpot area as well and develop a custom application for their marketplaces. Needs an estimate for 3 each app to be developed. An app/module for Microsoft Dynamics (latest stable version), that will connect to company's pbx API, to perform actions (simple REST API requests): call, get call history, etc Configuration functionality to set up some required data for API, such as username, password, domain, extension. It should be stored per logged user on the MD side. Left sidebar menu popup (box), it should looks similar, like in salesforce app (we will provide you with testing details, where you can check it out) Functionality to recognize phone number (the phone number in crm should be clickable, after click it should make a call on this number) Functionality to originate a call, after click on phone number Functionality to get details (call details/history, extension details) from API Functionality to check if there is active call for current extension (that is configured in MD), and display info on left sidebar box Possibility to save phone number in MD as lead/client in MD If this is something you can handle, please back to me with approximate time, cost estimation and info about the process. All the best.