Sole proprietorship is a very simple structure. If you are building your company as a sole proprietor, your company would be self owned with all debt responsibilities on you. Since there is unlimited liability, both your business and personal assets can be claimed to fulfill a debt. Due to this independent nature, raising capital will be a harder task.
On the other hand, you will have lower costs to this startup. You have more control over financial planning and decision making. And all of the profits belongs to you with many tax advantages. Most small businesses are structured as sole proprietorships for these ideal requirements and benefits.