It can take years
Of day to day, continuous work to build a business up to the point where you want it to be. Where you need it to be. Where your potential clients need it to be.
In the future, the monopolies aren’t going to be in a certain niche, or a certain industry. The monopolies are going to be in google placement. The cost of adwords has doubled over the last few years while the benefit of the paid advertising has gone down.