The funds at your disposal should determine your priorities.
The logo would be lower down that list.
But if you make a sizeable investment in a business, you should draw up your customer value proposition.
The professional thought process that goes into conceptualizing a logo, can also help in defining the business for you apart from giving it a distinctive identity.
A well-conceived (as opposed to just well-designed) logo can make it easier for you to reach out to your customer.
So the scope of a logo actually goes far beyond the logo per se and can actually be a vital part of the scope of work that a good business consultant would do for you.