And with just a little more data you can actually determine how many customers you would need for each year you plan for and how many leads you would need. From that you can actually determine what size market you would need and whether your market is big enough to supply those leads that could be converted into customers.
If you're one of the many people thinking about starting a small business, having a business plan is one of the first things you should have on your list of things to do. It doesn't matter if you're starting a small business from home or away, having a plan for your business is considered a blue print for a successful small business. What is a business plan and why do you need one?