There are many ways to create a hydroponic system, but all of them have one thing in common: it's an investment. Hydroponic systems can range from the super simple, do-it-yourself $20 setup to the high-end commercial systems that can cost $10,000 or more. Usually, home gardeners will purchase smart gardens like the AeroGarden Harvest that has everything you need to start quickly and easily.  Setting up a hydroponic system will depend on a few factors, such as: The type of plants you want to grow your current growing space, the types of nutrients you want to use, the type of system you want to use, the cost of obtaining that system, and the cost of maintaining that system.