Web Invoicing Tool Development, using home depot API

I need a straightforward, web-based invoicing tool that allows me to create professional invoices quickly and then follow them through the entire payment cycle. The core of the project is twofold:

• Invoice generation – a clean form where I can enter client details, line items, taxes or discounts and instantly produce a PDF or email-ready invoice.
• Payment tracking – a dashboard showing outstanding, partial and completed payments, with automatic status updates once a payment is recorded.

A simple, responsive interface is essential so I can work from any browser, and I’d like the codebase structured in a way that lets us bolt on extra modules later (for example, reporting and analytics) without major rewrites.

Please build with modern, widely supported web technologies. Security best practices for user authentication and data storage are a must, and if you have experience wiring similar tools into payment gateways or accounting platforms, let me know—we may extend the scope once the core functions are solid.

Deliverables are the deployed web app, source code, and a short setup document so I can install it on my own server or cloud account.