Starting a small business with 5k can be done if your idea is solid and you manage your money wisely. It's important to have a well thought out plan that details what type of business you want to start, how much money you'll need to get up and running, and how you are going to market it.
One idea is to start a service business, like a lawn-mowing, cleaning or painting service. This is a great low-investment way to get your business off the ground. You could also look into freelance writing, web design, or bookkeeping services. All of these can be started with little upfront investment and can be very profitable.
Another option is starting an online business. Selling goods or services online can be a great way to get started with a very small budget. You can create a website, setup a shopping cart, and link up with manufacturers and product fulfillment services to get your products shipped out to customers.
Finally, you could use the 5k to buy a franchise or existing business. Franchises usually require quite a bit of money to get started, but it may be possible to find one that matches your budget. Look into a few options thoroughly to make sure you understand their requirements and that the franchise will be profitable.
No matter which option you choose to start with 5k, make sure to do your research and come up with a business plan. Understand the market you are entering, know your competition, and plan how you are going to make your business a success. Good luck!