We've got about 52 horses, give or take. It's hard to remember them all =P There is 80 acres of property. About 20 of them live outside 24/7, the remaining 32, half are boarders and half lesson ponies/horses.
Don't think this counts since its on our farm (personal property)..we have 12 retired thoroughbreds (all outside 24/7) and then my qh filly..so a total of 13. (then there are 56 cow/calves/bulls, 7 dogs, 1 cat and a family of 3, lol!)