Can you name a few such countries. I live in the EU, but when you have a business in my country you are always breaking some rules no matter what, and a lot is up to the discretion of the tax people.
Cost of living: very low, 30-50% less than Austria/Germany.
But a lot of details are missing in them. Countries like Romania, Ukraine and Georgia have single-digit % tax for sole proprietors, but IIUC it applies on revenue, not income.
Estonia has 0% corporate tax, but 20% on dividends, which should go well with technique discussed in the OP.
Or for the higher income brackets, Italy has €100k/year flat tax: https://www.economist.com/europe/2020/10/29/a-flat-tax-schem...