Deep water culture system or DWC system is one of the few types of hydroponic system in which water is the main trigger. There’s no use and reliant of soil but effective in growing certain species of plants.
Deep water culture system is not limited to commercial growers and farmers. It can be also adapted by urban home owners and small gardeners. So the notion that this method is expensive isn’t entirely true. It all depends on how large the space is and how many plants you intend to grow. The more plants the more money is needed for sure.