I am drafting an initial project quote (with time/cost estimation, milestones, deliverables, etc.) for an expansion on a prototyping web application. The client would like to develop a complete UI editor within the existing framework. My main issue is how to draft the integration and development phase of this process. The technology used is html, css, javascript, react, & mysql. Again to reiterate I only need assistant drafting the wording for the project quote excel sheet.

Thank you in advance for any insights or references!