You charge by the hour, and you've capped your own income

Let us reason this through plainly, for the ceiling you feel is real, but it is not where you think it is. Hourly pricing chains your income to the one thing you cannot expand — your earnings become rate times hours, and hours are strictly finite, so you have tied your income to a resource you can never grow and built a ceiling no effort can raise, because effort only fills more of a fixed number of hours; the ceiling is structural, in the model, not a failure of your work. What you actually deliver is value, not hours — the client does not want your hours but the outcome they produce, the problem solved, and that value is not bound to time, so you have been pricing the input rather than the output, and value can be priced instead. And test one engagement priced by value, and let the ceiling lift — do not overhaul everything at once, but take one piece of work, price it by what the result is worth to the client, and let that experiment teach you what becomes possible when income is no longer chained to the clock. What kind of work do you charge hourly for?