I will build a contractor estimating and job costing system in one spreadsheet

The control the big platforms rent for tens of thousands a year, in a file you own. Price a job line by line against a loaded cost library, send a client ready proposal with your margin already in it, then track every cost, invoice, and change order so nothing slips. Read your business at a glance and know your margin before you break ground. Tell me your trade and how you work and I will fit the system to it.