Oh come on. Tax evasion by barbers is a classical example of why taxes are so high for the rest of us.

The cost of bookkeeping for a very small business is essentially zero. Everywhere that I know of exempts small business from double entry bookkeeping. VAT exemptions exist if revenue is low enough, too.

Privacy requirements are even easier: don't ask for, store, or process any personal information you don't absolutely need.

Your barber is being dramatic.