I'm currently half leasing a horse at a facility near school. 10 yo OTTB, very green. He is fairly out of shape due to a lot of time off during our school breaks, including summer (neither the owner nor I live nearby). He can be very sweet but his training is progressing pretty slowing and you get a rodeo trying to canter (possible due a bit of lameness, but nothing visible aside from some stiffness), hence mostly trot work as long as we're indoors this winter. I also tend to miss some days due to homework, exams, or breaks.
Since this is basically my only riding option during the school year, I would like to continue leasing. At any other barn, where you'd have other options, I would not keep it up. Lessoning with a trainer is not currently an option.
Given the situation, how much would you pay for this half lease while still being fair? The owner is willing to negotiate.
(I am aware of the general practices and forms of leasing, but this is a bit different.)