This number will depend on several factors. First and foremost is your local zoning laws. You must be zoned to own livestock, after that your local city or county codes will tell you how many equines you can own on a certain amount of land.
Another factor will be how you plan to keep the horse, if you plan to keep them on pasture then you'll only be able to keep one on a acre and a half of land. If you plan to keep the horse in a drylot situation then you could possibly keep 2 or more provided your enclosures are properly sized and you can buy enough hay to keep them fed.
45 acres because: farmer A = 30 acres divided by 2 horses = 15 acres per horse famer B = 15 acres times 3 horses = 45 acres
15 acres = 653,400ft²
15 acres = 60,702.85 square meters
15 acres is 653,400 square feet
Depends on where you and those 15 acres are located.
.15 acres
usually 5 acres or more. it depends how many horses you have.
15 square miles = 9,600 acres.
Roughly 30-40 acres
5
15 acres
It all depends on how many horses you have. You need one acre per horse for forage. So, say you have 6 horses, you need 6 acres.