For mains water, just attach a food-grade garden hose to the home's water inlet. For off-grid setups, your plumber installs a rainwater tank, pump and filtration system connected to the same inlet - rainwater is the most cost-effective long-term solution. Rule of thumb on tank size: 10,000L for a couple, 20,000L for a family of four. Water truck delivery is a solid backup ($200–$250 per 10,000 litres).