Looking at the initial purchase price alone, stainless steel water tanks are usually more expensive than fiberglass and galvanized steel plate water tanks. BUT! Considering its long service life, extremely low maintenance costs, almost maintenance free (especially compared to materials that are prone to rusting), and value in ensuring water quality safety, it is more cost-effective in the long run! Especially when high water quality is required or when used as a fire water tank (safety is priceless).