Making big money is often a matter of three to five years
Big money is made in three to five years! You either have it or you don't.
There is a very stupid idea: open a shop, run it for a lifetime, and support your life. This is a very deadly way of thinking.
The reality is: you have to save up your living expenses for the next five years in the three years of good weather. Then sell the business at the peak of the business, and drink tea, investigate and explore the next opportunity, and look for the next outlet in the following days.
Don't hold on to it, otherwise the result is often to lose the three years of profit intact, and finally end up in debt.