The easiest and cheapest option is the sole proprietorship, but to best protect your business, while still being affordable is the limited liability company. You'll want to research issues surrounding all forms of business structure now, because your decision will affect your startup costs, as well as your tax situation and your personal liability for the actions and debts of the business. Take advantage of the IRS's website for free tax information on the various legal forms of business organization.
Antiques, baked goods, catering, gourmet pet food, daycare, massage therapy, nanny service, personal chef, personal shopper, personal trainer, photographer, tutoring, wedding planning, wine consultant. You might create your own brand of homemade pet food and set yourself up to sell it on your own website. Parents and even older post-graduate students are usually very willing to part with dollars if you have the appropriate background to help them or their kids ace that next important test. As for catering, why not deliver homecooked meals from your own kitchen? Who says you have to invest in a commercial setup and do large events for hundreds of guests?
A customer persona is a fictionalized representation of a specific type of customer based on demographics and interests. Typically, a business will have several customer personas if they are selling to multiple customer types. You need to figure out which customer personas fit your business, because it’s important to know the demographics you should target in your market research.