A half acre = about 2,000 sqm, which is enough to run a profitable semi-intensive pig unit of 30–50 pigs if managed well. 1. Housing & Layout Divide the land: 1/4 acre for pig pens, 1/4 acre for feed crops/forage + waste management. Build raised, concrete-floor pens with good drainage. Each adult pig needs 1.5–2 sqm. Have separate sections: farrowing, weaners, growers, and boars. Provide shade, ventilation, and...