I already have a lightweight billing application generated with ChatGPT; the code is clean and working locally. What I need now is a fast-turnaround deployment—everything running smoothly on my live server within the next 10 hours. Core functions to be fully operational: • Invoice generation that automatically inserts customer details, an itemised list of charges and a clear due-date field. • Real-time payment tracking tied to each invoice. • A simple customer management panel so I can add, edit and search clients instantly. Payment handling must cover both PayPal and a unique bank-transfer API key I will supply at kickoff. Deliverables (all within the 10-hour window): 1. Software installed on my VPS (Ubuntu 22.04 with SSH access ready). 2. PayPal gateway and bank API configured, test payments verified. 3. Branded PDF invoice template aligned with my logo and colour palette. 4. One-page setup document outlining environment variables and update steps. I am on standby for immediate access credentials, quick feedback and end-of-job acceptance testing.