There are a million variations to leasing! At our barn if you lease one of our horses you have the option for a full or half lease. For a full lease you're basically responsible for all maintenance of the horse (board, farrier, vet, etc) plus a lease fee, which is dependant on the show quality of the horse. That horse is basically yours until the contract is up. For a half lease you pay half of all maintenance fees (vet/farrier bills are prorated per month) plus a smaller lease fee. However, medical bills are grouped into two catagories. The leasor pays for things that a result of the rider (injury, etc). For things that are purely accidental the barn pays. As far as riding, 3 days the horse is yours, 3 days the horse is the barns, and the 7th day the horse has off.