Responsive Wordpress Landing Page Builder Plugin

The plan is to build a wordpress plugin. This plugin's purpose is to help marketers with no programming experience prepare landing pages with complex forms and tracking integration using simple drag and drop interface. This project will involve coding the plugin from scratch without the use of tutorials or ready made online snippets. Basically the plugin should cover the following: - 4 Device views per page. (Desktop - Laptops - Tablets - Mobile) Which means you can have a different design for each device width. - Automatically generates an empty wordpress page template which is empty for the designer to have freedom. - Have all necessary core elements like rows and columns with all possible sizes preferrably bootstrap library hooked to the drag and drop interface. - All possible elements like Text boxes, images, videos, gallery, buttons, sliders, forms, code, maps. - integration section for facebook pixel, google tracking code and other marketing platforms. - Ability to redirect to other landing pages after form submission based on form submission. - Custom pre built pages section that can be saved and added to the plugin later with ease. Also an online shared section where people can share their own designs. - Plugin should be built to be subscription based where the plugin has to connect to server with login section to renew subscription and download designs.