I'm starting a business and need to choose a corporate structure. My situation: [DESCRIBE BUSINESS, FOUNDERS, REVENUE GOALS, INVESTORS]. Compare LLC, S-Corp, C-Corp, and sole proprietorship for my specific situation across: 1) Tax implications (specific to my revenue projection), 2) Liability protection, 3) Fundraising capability, 4) Administrative burden, 5) Exit strategy options. Give me a clear recommendation with reasoning.