How much money does it cost to keep a mini horse?
1 On average, a miniature horse is going to cost anywhere from $550 to as much as $7,000. 2  An older horse is usually going to cost more than a horse that is younger than the age of two. 3  Champi0n breeds can often cost more as well. The average horse boarding location can charge anywhere from $200 to as much as $800 per stall. 2  Like any pet, a horse will have to receive routine vaccinations and even vet checkups to ensure that their health is up to par.