The short answer for a Lusitano
Plan on roughly an acre to an acre and a half of grazing for one Lusitano, less rich than the pasture a thoroughbred type would need, plus a stable or shelter, a dry standing and feeding area, and an enclosed space to school. Lusitanos come from the dry landscapes of Portugal, where forage is seasonal and ground is firm, and the breed keeps that efficiency: many are notably good doers. In a wet, lush climate the challenge is rarely growing enough grass for a Lusitano. It is stopping the grass, and the mud that comes with it, from harming him.
Iberian efficiency on northern grass
The Lusitano was built for close, brave, agile work: bullfighting, classical dressage, and ranch work across dry Portuguese country. Its compact, muscular frame and naturally elevated movement come with a metabolism tuned to make much from little. Turned out all day on fertilised pasture, a Lusitano will often gain condition faster than expected, and Iberian breeds are watched carefully by vets for exactly that tendency toward easy weight gain. Sectioning the field, strip grazing, or keeping a dry lot for part of the day is not stinginess with this breed; it is how you reproduce the conditions his whole physiology expects.
Ground and footing for an agile horse
Lusitanos are quick on their feet, playful, and fond of showing off in the field, with sudden turns and collected canters across the paddock. Ground that is either bottomless mud or rutted and rock-hard punishes that athleticism, so drainage and rotation matter: rest sections before they are grazed to mud, put hardstanding at gates, troughs, and shelter mouths, and keep a surfaced sacrifice area for the wettest weeks. Shade deserves a line in the plan too. A breed made for Iberian sun tolerates heat well, but in humid summers flies and heat still drive horses to shelter, and a shady corner or open shelter keeps turnout genuinely restful.
Schooling space for working equitation and dressage
This is a breed people buy to ride with precision: working equitation obstacles, classical dressage, and trail work all feature. A level, enclosed schooling area, which can be more compact than a jumping arena, lets that training happen at home, and storage for obstacles, poles, and garrocha-style equipment needs a dry corner somewhere. In-hand and long-rein work are common with Iberians, so safe fencing without protruding fittings around the schooling space is worth the small extra thought. As with any horse, do not let the arena quietly eat the grazing in your calculations; the acre that schools him does not also feed him.
Fencing, shelter, and temperament
Lusitanos are intelligent, sensitive, and famously bonded to their people, but they are still entire-minded in play and many are kept as stallions in their home tradition, so fencing should be strong, visible, and in good repair, with extra care wherever horses meet over a boundary. Shelter can be straightforward: an open-fronted shelter or stable for the worst weather, since a healthy Lusitano with a good coat handles cold adequately, though wet cold is harder on Iberians than the dry cold of home. Company is essential; these are herd horses, and a companion's grazing belongs in the budget beside his own.
One plan for a sensitive horse
A Lusitano reads inconsistency instantly, and mixed messages about turnout times, field sections, and feed undo his calm faster than most breeds. In KinsLe, Family Sharing holds your Lusitano's grazing sections, schooling days, and feeding notes in a single shared profile, so every handler gives him the same steady routine.