If you’ve received gifts you really don’t want – and they’re still in the packages – try returning them. Some retailers will take them back up to a year later. If you are not sure where the item was purchased, try going online and searching. If a retailer like Walmart or Target pops up then you can return it there without a receipt and get a gift card.
Write a business plan. Include information on what you plan to do and what differentiates you from competitors. Incorporate market research that shows your understanding of the business sector you wish to enter. Detail what you will sell and how. Consider including a marketing plan and realistic financial projections, if you are 13-15, get some help from an adult if you need to. This will give you structure as you go about starting your business.
But don't make the mistake of thinking this will be a passive source of income—you're on call whenever you have a guest and you'll always need to keep the place clean for incoming visitors. On top of just renting on Airbnb, consider offering your guests paid add-ons, like Lauren Gheysens', Royal Day Out in London, England—where she gives visitors a local's only tour of the city, complete with bespoke 18th century costumes.
How much will you make? I think my best month with Google AdSense was almost $5,000 over the last ten years. That amazing month blew my mind since it was actually near the beginning of my blogging journey. When you go from making zero to $5,000 in a month, that will rock your world. For me, it also got me even more excited because I knew there were other ways to monetize.