Only you can determine that. Does your market area have sufficient spending power to purchase enough of your products and services to enable you to make a profit? Operations Management: Capitalize on physical facilities location, capacity, etc.
Also keep in mind that if you plan to sell products online the global marketplace is incredibly crowded and competitive. How successful are they?
Then focus on providing detail and backup for your marketing plan. What Are Marketing Objectives and Goals?
Some businesses prefer to list their individual products or services as separate objectives. The rental shop will solve that problem by offering a lower-cost and convenient alternative.
These examples are just the tip of the iceberg. Ferraris are awesome but you're unlikely to sell many where I live.
Review your current prices to determine how they position you in the marketplace. Learn from competitor strengths, take advantage of competitor's weaknesses, and apply the same analysis to your own business plan. Keep in mind competitive analysis does more than help you understand your competition.
Marketing--whether advertising, public relations, promotional literature, etc--is an investment in the growth of your business.