3
" Solo businesses that hit the million-dollar range typically fall into six categories: 1. E-commerce; 2. Manufacturing; 3. Informational content creation; 4. Professional services and creative businesses, such as marketing firms, public speaking businesses, and consultancies. 5. Personal services firms, offering expertise, such as fitness coaching; 6. Real estate. These companies use outsourcing, automation, mobile technology, or a combination of all three to build, operate, and grow their businesses. "
― , The Million-Dollar, One-Person Business: Make Great Money. Work the Way You Like. Have the Life You Want.