I recently signed a half lease contract. Lease was done through trainer(s) who had been riding the horse. Contract was very straight forward (signed w/ owner), but I'm glad we have one! For our purposes:
-Horse's owner covers board, farrier, vet
-HO provides halter, lead rope, grooming equipment
-I pay monthly lease fee
-I am also required to take minimum 1 lesson/month with trainer who comes out to facility.
-Facility is DIY, so owner usually texts me if anything specific needs to be done while I'm out there. Horse is currently pasture boarded so this is not a big deal.
So far (it's only been 2 weeks) the lease has worked out well. We added specific days I would ride onto the bottom of the contract, though so far the horses owner has been really flexible if I need to change them due to work schedule or weather.
I'm not sure I like the idea of a free lease contract. I think people tend to take contracts more seriously if actual money changes hands. I would charge a lease fee that would cover board etc and continue paying all those fees directly yourself so you have a direct hand in horse's care. Does this make sense, or am I just crazy? IDK, maybe this makes less sense for a full lease, but I am glad my half lease has worked out the way it has.
"Choose to chance the rapids, and dare to dance the tides" - Garth Brooks
"With your permission, dear, I'll take my fences one at a time" - Maggie Smith, Downton Abbey