I have done several types of lease methods and they all worked out for me and the leasee.
1. Free Lease- They pay everything; vaccines, board, feed, shoeing... Sold 1 horse this way
2. Chore Lease- I pay feed, vaccines, board. They pay for shoeing, clean stalls, feed and groom for 4 horse to my standards and then they can ride after 4 years sold 1 horse this way.
3. Lease- They pay me $250.00 which goes back into the horse's care. They pay farrier and they do full care after 2 months, I sold 1 horse this way and the couple gave me more money than my asking price!?
Be flexible-within reason and know the person you are going to lease to.
All the leases I have done is a result of people coming to me and asking if I would lease a horse to them. They came up with the above methods. I am not in the market to sell but my horses have been a perfect match for that special person. I have sold 3 horses by leasing them out. Problem for me is that I had 5 horses and now I am down to 2. I don't want another empty nest... lol