Quantifying your goal helps you answer questions like "How can I get there from here?", "How long will it take?", "Will I ever make it there at my current trajectory?", and "Do I still need to work anymore?"
And it will also tell you, "How much do I have to charge, and to how many customers?", which will help you avoid low-margin, hard-sale markets, and get you thinking about recurring revenue.
If your goal is to make a million dollars a year with a certain product or service, the number of units of that service or product that you can provide (e.g. you have time to take on only so many projects a year, you're hand-building furniture and can make so many a week, etc.) or the expected number of sales you can make tells you how much you would need to charge to reach your goal. price = $1,000,000/# units
But it really depends on what end of the stick you're looking at. The OP's objective is to reach a certain revenue. You can look from the other side and say "I'll be selling my product at that price, which means I'll make price*units per year."