As a business owner, you are likely to be very knowledgeable about standard business practices. What a business consultant brings to the table is a specialization in business strategies, trends, and even methodologies to running a business. With the business consultant having this under their belt, the owner has more time to focus on what their strengths are. When having the ability to focus in just a handful of particular areas instead of all areas, you actually wind up not only saving time and money, but also decrease the amount of stress you likely have to deal with!
Business consultants are usually temporary positions. So although there will be a short term investment, this will not be a full-time employee so you might actually wind up saving money in the long run. (Unless you choose to keep the consultant permanently of course.)
As mentioned in previous posts, business consultants will work directly with your employees. Since the consultant is a non-bias party, your employees may find ease in working with them and working together to reach goals. Business consultants will have the proper tools to help motivate employees to achieve deadlines and other goals that are important to a growing and successful business.
Business consultants work not only with new companies, but also existing companies that might be struggling or wanting to grow. As a new business, your consultant will help with developing processes from the beginning instead of coming in to an existing business where processes are non-existent or not specifically written down. Starting off with a business consultant from the start is also beneficial because they can also help hire employees that would be best suited for your new business. If you are an existing company and you are having issues with finances or even reputation management, a business consultant can swoop in and help before it turns into an area of no return.