If you need to get going quickly to ride the wave of a fad before it fizzles, then fast, bare_bones planning may be all you've got time to execute. This works best when you've already got the infrastructure in place, perhaps from previous projects or an established business, and you can simply shift energy and resources to the new idea.
So, what would your business look like over the next 10 years to give you that? Could you build a plan that would show exactly how your business could do that? It would show what your sales, fixed expenses, material cost, labor cost, and variable expenses would need to be. It should also show you how many customers you would need and would show you what your profit and profit margins would be each year. All it takes is your current business numbers as we listed earlier and you can make a business plan as many years out as you like.