To get a better estimate, you can ask potential suppliers for required inventory levels for your type of business. Some entrepreneurs, particularly those who create their own products, take years of product development before a prototype can be launched. You need to factor in the length of time that will take you to develop your first products. Advertising and Marketing Promotion Expenses. You can chose to have some 'buzz' for your business, even before you officially open.
Some entrepreneurs do a pre-launch campaign to generate interest for their products or services.
The cost, of course, will depend on how simple or elaborate your pre-launch activities will be. This refers to the amount of cash that you need to run your cash register. One thing that your business should never be caught without is cash. Cost of Financing. You also need to allocate some funds to help you cover your cost of financing, whether you got your funds from the bank or from your credit card.