How to maintain private construction accounts

The principles of accounting are
Very much the same for different industries.
Try and set up a system of Accounting using SPREADSHEETS.
A thorough knowledge of EXCEL
Is required.

A "thorough" knowledge of Excel is NOT required, though it certainly can help things to know something about it.

What you need to learn something about is accounting. Do you think someone on here in just one simply post can tell you everything about how to keep your books?