A personal or virtual assistant performs many of those secretarial or front-desk functions without being onsite.For those with the entrepreneurial spirit, startup costs can be a significant barrier. The following business ideas require little in the way of startup costs or resources and respond quickly to some good old-fashioned hard work.For those dreaming big on a small budget, here are a few low-cost businesses to inspire that entrepreneurial passion.With so many other responsibilities, business owners may be too busy or overwhelmed to spend time coming up with a great social media strategy. If you know something inside and out, you can help others enrich their lives by offering virtual classes.As a consultant, you can help them determine the best tactics, posting schedules and content for their target audience. Create downloadable instructional packets and videos, or schedule real-time Skype lessons with clients.There's a growing demand for training from amateurs and professionals looking to expand their skillsets.Technical manuals are available for programs like Quick Books and Final Cut Pro, but these are often expensive and difficult for the average user to understand.These individuals often work from home for many different clients, keeping track of calendars, making flight arrangements and doing clerical work.If you're a highly organized, detail-oriented individual who loves putting parties together, you might have the right personality to launch an event-planning business.The right, driven individual can take care of these time-consuming errands for clients and free up their days for the important things in life.Account for travel expenses when determining your rates, which can be hourly or by the task. The importance of good reviews has not been lost on companies large and small.