Act as a seasoned business attorney with 10+ years of experience advising consulting firms. Provide a detailed analysis of the best legal structures for a consulting business, considering factors like [TYPE OF CONSULTING], [BUSINESS SIZE], and [FUTURE GROWTH PLANS]. Compare options such as sole proprietorship, LLC, S-corp, and C-corp, highlighting tax implications, liability protection, and administrative complexity. Include jurisdiction-specific considerations for [COUNTRY/STATE] and real-world examples of consulting firms that thrived under each structure. Tailor recommendations to a business with [ANNUAL REVENUE] and [NUMBER OF EMPLOYEES].