Join Date: Aug 2009
Location: New South Wales, Australia
As you are the owner you can decide the terms.
If I were you I would work out the days that suit you, and if you plan to compete or attend things with your horse. Then find someone who would want to ride when it doesn't suit you. You could work out the costs every week and split them, or together work out an "average" and then just charge them that fee every week.
There isn't any set way to half lease, its just about what works for you and what works for the other person.