Plumbing Business Automation in Google Sheets

I need an automated Google Sheets setup for my plumbing business. Currently, I manage everything manually in Google Sheets, and I'm looking to streamline the process.

I want to automate the following tasks:
- Sales Receipts
- Estimates
- Invoices

Additionally, the automated sheet should include:
- Customer Database
- Inventory Tracking
- Payment Tracking

Ideal Skills and Experience:
- Proficiency in Google Sheets
- Experience in creating automated spreadsheets
- Familiarity with business management needs, especially for plumbing or similar trades